Fixed bug #215

The current SVN trunk is missing the SDLCALL specifier at numerous locations.

It has to be added for all (possibly user provided) callbacks.

I stumbled over this while creating a makefile for the OpenWatcom compiler for
Win32.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401728

src/thread/win32/SDL_systhread.c

@@ -41,6 +41,15 @@ typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
         unsigned (__stdcall *func)(void *), void *arg, 
         unsigned, unsigned *threadID);
 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
+#elif defined(__WATCOMC__)
+/* This is for Watcom targets except OS2 */
+#if __WATCOMC__ < 1240
+#define __watcall
+#endif
+typedef unsigned long (__watcall *pfnSDL_CurrentBeginThread) (void *, unsigned,
+        unsigned (__stdcall *func)(void *), void *arg, 
+        unsigned, unsigned *threadID);
+typedef void (__watcall *pfnSDL_CurrentEndThread)(unsigned code);
 #else
 typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
         unsigned (__stdcall *func)(void *), void *arg,