Make compile with msvc, clang and gcc on Windows

Utilities/CRC.h

@@ -725,7 +725,7 @@ namespace CRCPP
 		{
 			while (size--)
 			{
-#if defined(WIN32) || defined(_WIN32) || defined(WINCE)
+#ifdef _MSC_VER
 				// Disable warning about data loss when doing (remainder >> CHAR_BIT) when
 				// remainder is one byte long. The algorithm is still correct in this case,
 				// though it's possible that one additional machine instruction will be executed.
@@ -733,7 +733,7 @@ namespace CRCPP
 #   pragma warning (disable : 4333)
 #endif
 				remainder = (remainder >> CHAR_BIT) ^ lookupTable[static_cast<unsigned char>(remainder ^ *current++)];
-#if defined(WIN32) || defined(_WIN32) || defined(WINCE)
+#ifdef _MSC_VER
 #   pragma warning (pop)
 #endif
 			}