Added new "SIG_VERIFY_E" type for "wc_SignatureVerify" failure. Added argument checking on new signature wrapper functions. Added new "NO_SIG_WRAPPER" to optionally disable wrappers to reduce code size.

wolfcrypt/src/error.c

@@ -361,6 +361,9 @@ const char* wc_GetErrorString(int error)
     case WC_INIT_E:
         return "wolfCrypt Initialize Failure error";
 
+    case SIG_VERIFY_E:
+        return "Signature verify error";
+
     default:
         return "unknown error number";