More signed overflow avoidance

test/endian_arithmetic_test.cpp

@@ -138,7 +138,7 @@ template<class T> void test( T const& x )
 
 int main()
 {
-    test( 0xF1F2 );
+    test( 0x7EF2 );
     test( 0x01020304u );
 
     return boost::report_errors();