xprepare: simplify error handling

If either of the two allocations fail we want to take the same action
so use a single if statement. This saves a few lines and makes it
easier for the next commit to add a couple more allocations.

Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: phillipwood

xdiff/xprepare.c

@@ -282,11 +282,8 @@ static int xdl_cleanup_records(xdlclassifier_t *cf, xdfile_t *xdf1, xdfile_t *xd
 	 * Create temporary arrays that will help us decide if
 	 * changed[i] should remain false, or become true.
 	 */
-	if (!XDL_CALLOC_ARRAY(action1, len1)) {
-		ret = -1;
-		goto cleanup;
-	}
-	if (!XDL_CALLOC_ARRAY(action2, len2)) {
+	if (!XDL_CALLOC_ARRAY(action1, len1) ||
+	    !XDL_CALLOC_ARRAY(action2, len2)) {
 		ret = -1;
 		goto cleanup;
 	}