Fix compilation error after recent libmv change

- Tweaked typedefs in stdint so they match
  what we've got in BLI_sys_types (needed to
  explicitly tell sign to MSVC).

  Not so much harmful to be more explicit here,
  but we really better to have single stdint
  int blender.

- Tweaked allocations macros so MSVC is happy
  with structures allocation.

intern/guardedalloc/MEM_guardedalloc.h

@@ -256,12 +256,6 @@ public:                                                                       \
 			((type*)(what))->~type(); \
 			MEM_freeN(what); \
 	} } (void)0
-#define OBJECT_GUARDED_DELETE_ARRAY(what, type, count) \
-	{ if(what) { \
-			for (int i = 0; i < count; i++) ((type*)(what))[i].~type(); \
-			MEM_freeN(what); \
-	} } (void)0
-
 #endif  /* __cplusplus */
 
 #ifdef __cplusplus