Ignore gcc-specific pragmas when using other compilers (issue #25)

Author: mvandervoord

lib/CException.c

@@ -1,9 +1,15 @@
 #include "CException.h"
 
+#ifdef __GNUC__
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
 volatile CEXCEPTION_FRAME_T CExceptionFrames[CEXCEPTION_NUM_ID] = {{ 0 }};
+
+#ifdef __GNUC__
 #pragma GCC diagnostic pop
+#endif
 
 //------------------------------------------------------------------------------------------
 //  Throw