Substitute xmalloc()+memset(0) with xcalloc().

Signed-off-by: Peter Eriksen <s022018@student.dtu.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>

builtin-add.c

@@ -21,8 +21,7 @@ static void prune_directory(struct dir_struct *dir, const char **pathspec, int p
 
 	for (specs = 0; pathspec[specs];  specs++)
 		/* nothing */;
-	seen = xmalloc(specs);
-	memset(seen, 0, specs);
+	seen = xcalloc(specs, 1);
 
 	src = dst = dir->entries;
 	i = dir->nr;

builtin-rm.c

@@ -90,8 +90,7 @@ int cmd_rm(int argc, const char **argv, char **envp)
 	seen = NULL;
 	for (i = 0; pathspec[i] ; i++)
 		/* nothing */;
-	seen = xmalloc(i);
-	memset(seen, 0, i);
+	seen = xcalloc(i, 1);
 
 	for (i = 0; i < active_nr; i++) {
 		struct cache_entry *ce = active_cache[i];

combine-diff.c

@@ -639,8 +639,7 @@ static int show_patch_diff(struct combine_diff_path *elem, int num_parent,
 			/* deleted file */
 			result_size = 0;
 			elem->mode = 0;
-			result = xmalloc(1);
-			result[0] = 0;
+			result = xcalloc(1, 1);
 		}
 		if (0 <= fd)
 			close(fd);