Fix GE448 conversion warning:

`error: conversion from ‘word32’ {aka ‘unsigned int’} to ‘byte’ {aka ‘unsigned char’} may change value`

wolfcrypt/src/ge_448.c

@@ -5453,56 +5453,56 @@ void sc448_reduce(byte* b)
     b[ 0] = (byte)(d[0 ] >>  0);
     b[ 1] = (byte)(d[0 ] >>  8);
     b[ 2] = (byte)(d[0 ] >> 16);
-    b[ 3] = (byte)(d[0 ] >> 24) + ((d[1 ] >>  0) <<  4);
+    b[ 3] = (byte)(d[0 ] >> 24) + (byte)((d[1 ] >>  0) <<  4);
     b[ 4] = (byte)(d[1 ] >>  4);
     b[ 5] = (byte)(d[1 ] >> 12);
     b[ 6] = (byte)(d[1 ] >> 20);
     b[ 7] = (byte)(d[2 ] >>  0);
     b[ 8] = (byte)(d[2 ] >>  8);
     b[ 9] = (byte)(d[2 ] >> 16);
-    b[10] = (byte)(d[2 ] >> 24) + ((d[3 ] >>  0) <<  4);
+    b[10] = (byte)(d[2 ] >> 24) + (byte)((d[3 ] >>  0) <<  4);
     b[11] = (byte)(d[3 ] >>  4);
     b[12] = (byte)(d[3 ] >> 12);
     b[13] = (byte)(d[3 ] >> 20);
     b[14] = (byte)(d[4 ] >>  0);
     b[15] = (byte)(d[4 ] >>  8);
     b[16] = (byte)(d[4 ] >> 16);
-    b[17] = (byte)(d[4 ] >> 24) + ((d[5 ] >>  0) <<  4);
+    b[17] = (byte)(d[4 ] >> 24) + (byte)((d[5 ] >>  0) <<  4);
     b[18] = (byte)(d[5 ] >>  4);
     b[19] = (byte)(d[5 ] >> 12);
     b[20] = (byte)(d[5 ] >> 20);
     b[21] = (byte)(d[6 ] >>  0);
     b[22] = (byte)(d[6 ] >>  8);
     b[23] = (byte)(d[6 ] >> 16);
-    b[24] = (byte)(d[6 ] >> 24) + ((d[7 ] >>  0) <<  4);
+    b[24] = (byte)(d[6 ] >> 24) + (byte)((d[7 ] >>  0) <<  4);
     b[25] = (byte)(d[7 ] >>  4);
     b[26] = (byte)(d[7 ] >> 12);
     b[27] = (byte)(d[7 ] >> 20);
     b[28] = (byte)(d[8 ] >>  0);
     b[29] = (byte)(d[8 ] >>  8);
     b[30] = (byte)(d[8 ] >> 16);
-    b[31] = (byte)(d[8 ] >> 24) + ((d[9 ] >>  0) <<  4);
+    b[31] = (byte)(d[8 ] >> 24) + (byte)((d[9 ] >>  0) <<  4);
     b[32] = (byte)(d[9 ] >>  4);
     b[33] = (byte)(d[9 ] >> 12);
     b[34] = (byte)(d[9 ] >> 20);
     b[35] = (byte)(d[10] >>  0);
     b[36] = (byte)(d[10] >>  8);
     b[37] = (byte)(d[10] >> 16);
-    b[38] = (byte)(d[10] >> 24) + ((d[11] >>  0) <<  4);
+    b[38] = (byte)(d[10] >> 24) + (byte)((d[11] >>  0) <<  4);
     b[39] = (byte)(d[11] >>  4);
     b[40] = (byte)(d[11] >> 12);
     b[41] = (byte)(d[11] >> 20);
     b[42] = (byte)(d[12] >>  0);
     b[43] = (byte)(d[12] >>  8);
     b[44] = (byte)(d[12] >> 16);
-    b[45] = (byte)(d[12] >> 24) + ((d[13] >>  0) <<  4);
+    b[45] = (byte)(d[12] >> 24) + (byte)((d[13] >>  0) <<  4);
     b[46] = (byte)(d[13] >>  4);
     b[47] = (byte)(d[13] >> 12);
     b[48] = (byte)(d[13] >> 20);
     b[49] = (byte)(d[14] >>  0);
     b[50] = (byte)(d[14] >>  8);
     b[51] = (byte)(d[14] >> 16);
-    b[52] = (byte)(d[14] >> 24) + ((d[15] >>  0) <<  4);
+    b[52] = (byte)(d[14] >> 24) + (byte)((d[15] >>  0) <<  4);
     b[53] = (byte)(d[15] >>  4);
     b[54] = (byte)(d[15] >> 12);
     b[55] = (byte)(d[15] >> 20);
@@ -6206,56 +6206,56 @@ void sc448_muladd(byte* r, const byte* a, const byte* b, const byte* d)
     r[ 0] = (byte)(rd[0 ] >>  0);
     r[ 1] = (byte)(rd[0 ] >>  8);
     r[ 2] = (byte)(rd[0 ] >> 16);
-    r[ 3] = (byte)(rd[0 ] >> 24) + ((rd[1 ] >>  0) <<  4);
+    r[ 3] = (byte)(rd[0 ] >> 24) + (byte)((rd[1 ] >>  0) <<  4);
     r[ 4] = (byte)(rd[1 ] >>  4);
     r[ 5] = (byte)(rd[1 ] >> 12);
     r[ 6] = (byte)(rd[1 ] >> 20);
     r[ 7] = (byte)(rd[2 ] >>  0);
     r[ 8] = (byte)(rd[2 ] >>  8);
     r[ 9] = (byte)(rd[2 ] >> 16);
-    r[10] = (byte)(rd[2 ] >> 24) + ((rd[3 ] >>  0) <<  4);
+    r[10] = (byte)(rd[2 ] >> 24) + (byte)((rd[3 ] >>  0) <<  4);
     r[11] = (byte)(rd[3 ] >>  4);
     r[12] = (byte)(rd[3 ] >> 12);
     r[13] = (byte)(rd[3 ] >> 20);
     r[14] = (byte)(rd[4 ] >>  0);
     r[15] = (byte)(rd[4 ] >>  8);
     r[16] = (byte)(rd[4 ] >> 16);
-    r[17] = (byte)(rd[4 ] >> 24) + ((rd[5 ] >>  0) <<  4);
+    r[17] = (byte)(rd[4 ] >> 24) + (byte)((rd[5 ] >>  0) <<  4);
     r[18] = (byte)(rd[5 ] >>  4);
     r[19] = (byte)(rd[5 ] >> 12);
     r[20] = (byte)(rd[5 ] >> 20);
     r[21] = (byte)(rd[6 ] >>  0);
     r[22] = (byte)(rd[6 ] >>  8);
     r[23] = (byte)(rd[6 ] >> 16);
-    r[24] = (byte)(rd[6 ] >> 24) + ((rd[7 ] >>  0) <<  4);
+    r[24] = (byte)(rd[6 ] >> 24) + (byte)((rd[7 ] >>  0) <<  4);
     r[25] = (byte)(rd[7 ] >>  4);
     r[26] = (byte)(rd[7 ] >> 12);
     r[27] = (byte)(rd[7 ] >> 20);
     r[28] = (byte)(rd[8 ] >>  0);
     r[29] = (byte)(rd[8 ] >>  8);
     r[30] = (byte)(rd[8 ] >> 16);
-    r[31] = (byte)(rd[8 ] >> 24) + ((rd[9 ] >>  0) <<  4);
+    r[31] = (byte)(rd[8 ] >> 24) + (byte)((rd[9 ] >>  0) <<  4);
     r[32] = (byte)(rd[9 ] >>  4);
     r[33] = (byte)(rd[9 ] >> 12);
     r[34] = (byte)(rd[9 ] >> 20);
     r[35] = (byte)(rd[10] >>  0);
     r[36] = (byte)(rd[10] >>  8);
     r[37] = (byte)(rd[10] >> 16);
-    r[38] = (byte)(rd[10] >> 24) + ((rd[11] >>  0) <<  4);
+    r[38] = (byte)(rd[10] >> 24) + (byte)((rd[11] >>  0) <<  4);
     r[39] = (byte)(rd[11] >>  4);
     r[40] = (byte)(rd[11] >> 12);
     r[41] = (byte)(rd[11] >> 20);
     r[42] = (byte)(rd[12] >>  0);
     r[43] = (byte)(rd[12] >>  8);
     r[44] = (byte)(rd[12] >> 16);
-    r[45] = (byte)(rd[12] >> 24) + ((rd[13] >>  0) <<  4);
+    r[45] = (byte)(rd[12] >> 24) + (byte)((rd[13] >>  0) <<  4);
     r[46] = (byte)(rd[13] >>  4);
     r[47] = (byte)(rd[13] >> 12);
     r[48] = (byte)(rd[13] >> 20);
     r[49] = (byte)(rd[14] >>  0);
     r[50] = (byte)(rd[14] >>  8);
     r[51] = (byte)(rd[14] >> 16);
-    r[52] = (byte)(rd[14] >> 24) + ((rd[15] >>  0) <<  4);
+    r[52] = (byte)(rd[14] >> 24) + (byte)((rd[15] >>  0) <<  4);
     r[53] = (byte)(rd[15] >>  4);
     r[54] = (byte)(rd[15] >> 12);
     r[55] = (byte)(rd[15] >> 20);