include: Annotate PFLT_CONTEXT_ALLOCATE_CALLBACK with __WINE_ALLOC_SIZE.

include/ddk/fltkernel.h

@@ -585,7 +585,7 @@ typedef struct _FLT_CALLBACK_DATA
     KPROCESSOR_MODE RequestorMode;
 } FLT_CALLBACK_DATA, *PFLT_CALLBACK_DATA;
 
-typedef void*    (WINAPI *PFLT_CONTEXT_ALLOCATE_CALLBACK)(POOL_TYPE,SIZE_T,FLT_CONTEXT_TYPE);
+typedef void*    (__WINE_ALLOC_SIZE(2) WINAPI *PFLT_CONTEXT_ALLOCATE_CALLBACK)(POOL_TYPE,SIZE_T,FLT_CONTEXT_TYPE);
 typedef void     (WINAPI *PFLT_CONTEXT_CLEANUP_CALLBACK)(PFLT_CONTEXT, FLT_CONTEXT_TYPE);
 typedef void     (WINAPI *PFLT_CONTEXT_FREE_CALLBACK)(void *, FLT_CONTEXT_TYPE);
 typedef NTSTATUS (WINAPI *PFLT_FILTER_UNLOAD_CALLBACK)(FLT_FILTER_UNLOAD_FLAGS);