OS X buildfix

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5429 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Common/Src/CommonTypes.h

@@ -46,10 +46,10 @@ typedef unsigned short u16;
 typedef unsigned int u32;
 typedef unsigned long long u64;
 
-typedef char s8;
-typedef short s16;
-typedef int s32;
-typedef long long s64;
+typedef signed char s8;
+typedef signed short s16;
+typedef signed int s32;
+typedef signed long long s64;
 
 #endif
 // For using windows lock code