Add log.h to files that need it

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/region.h

@@ -43,7 +43,7 @@ from_x_rect(const xcb_rectangle_t *rect) {
 /// Returning an array that needs to be freed
 static inline rect_t *
 from_x_rects(int nrects, const xcb_rectangle_t *rects) {
-  rect_t *ret = calloc(nrects, sizeof *ret);
+  rect_t *ret = ccalloc(nrects, rect_t);
   for (int i = 0; i < nrects; i++)
     ret[i] = from_x_rect(rects+i);
   return ret;