Fixed bug 3388 - Fail to build src/thread/windows/SDL_systhread.c on MinGW 4.9.3

Vitaly Novichkov

Line 124
====================================================================
const DWORD flags = thread->stacksize ? STACK_SIZE_PARAM_IS_A_RESERVATION : 0;
====================================================================

Error of compiler:
====================================================================
  CC     build/SDL_systhread.lo
src/thread/windows/SDL_systhread.c: In function 'SDL_SYS_CreateThread':
src/thread/windows/SDL_systhread.c:124:45: error: 'STACK_SIZE_PARAM_IS_A_RESERVA
TION' undeclared (first use in this function)
     const DWORD flags = thread->stacksize ? STACK_SIZE_PARAM_IS_A_RESERVATION :
 0;
                                             ^
src/thread/windows/SDL_systhread.c:124:45: note: each undeclared identifier is r
eported only once for each function it appears in
make: *** [build/SDL_systhread.lo] Error 1
====================================================================

Fixing when I adding into begin of the file:
====================================================================
#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
#define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
#endif
====================================================================

src/thread/windows/SDL_systhread.c

@@ -33,6 +33,10 @@
 /* We'll use the C library from this DLL */
 #include <process.h>
 
+#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION
+#define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000
+#endif
+
 /* Cygwin gcc-3 ... MingW64 (even with a i386 host) does this like MSVC. */
 #if (defined(__MINGW32__) && (__GNUC__ < 4))
 typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,