Remove xcalloc() and convert its callers to xzalloc().  About half of them
were using "1" as one of the arguments anyway, and as for the rest a multiply
and a push isn't noticeably bigger than pushing two arguments on the stack.
diff --git a/e2fsprogs/fsck.c b/e2fsprogs/fsck.c
index afb6f0c..99ffed1 100644
--- a/e2fsprogs/fsck.c
+++ b/e2fsprogs/fsck.c
@@ -877,8 +877,8 @@
 		}
 	}
 
-	cmp->list = xcalloc(num, sizeof(char *));
-	cmp->type = xcalloc(num, sizeof(int));
+	cmp->list = xzalloc(num * sizeof(char *));
+	cmp->type = xzalloc(num * sizeof(int));
 	cmp->negate = 0;
 
 	if (!fs_type)