Merge branch 'rs/realloc-array'

Code cleanup.

* rs/realloc-array:
  use REALLOC_ARRAY for changing the allocation size of arrays
  add macro REALLOC_ARRAY

git.c

@@ -282,8 +282,7 @@ static int handle_alias(int *argcp, const char ***argv)
 				  "trace: alias expansion: %s =>",
 				  alias_command);
 
-		new_argv = xrealloc(new_argv, sizeof(char *) *
-				    (count + *argcp));
+		REALLOC_ARRAY(new_argv, count + *argcp);
 		/* insert after command name */
 		memcpy(new_argv + count, *argv + 1, sizeof(char *) * *argcp);