medfall

commit 27bcb570f0918d4c6fc0595ea246a285f4c58db7
parent 925bebae981eff8131fb4e0b32e4dd3706f766bb
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Wed Sep 14 16:48:55 +0100

Return NULL if GetLastError returns 0

Diffstat:
win32_library.h
 | 
7
++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/win32_library.h b/win32_library.h
@@ -19,8 +19,13 @@ const char * library_last_error() {
 	 * these functions should really only get called by the main thread, so
 	 * this should be ok
 	 */
+	DWORD error = GetLastError();
+	if( error == 0 ) {
+		return NULL;
+	}
+
 	static char buf[ 1024 ];
-	FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(),
+	FormatMessageA( FORMAT_MESSAGE_FROM_SYSTEM, NULL, error,
 		MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), buf, sizeof( buf ), NULL );
 	return buf;
 }