x64: updated system call signatures to accepts and return values of type intptr_t.

code/server/sv_game.c

@@ -305,16 +305,10 @@ SV_GameSystemCalls
 The module is making a system call
 ====================
 */
-//rcg010207 - see my comments in VM_DllSyscall(), in qcommon/vm.c ...
-#if ((defined __linux__) && (defined __powerpc__))
-#define VMA(x) ((void *) args[x])
-#else
 #define	VMA(x) VM_ArgPtr(args[x])
-#endif
+#define	VMF(x) (*(float*)&args[x])
 
-#define	VMF(x)	((float *)args)[x]
-
-int SV_GameSystemCalls( int *args ) {
+intptr_t SV_GameSystemCalls( intptr_t *args ) {
 	switch( args[0] ) {
 	case G_PRINT:
 		Com_Printf( "%s", VMA(1) );