ipfw: correctly report table manipulation errors

Let ipfw(8) report the actual error instead of the error that
may have come from calling printf().

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1221

sbin/ipfw/tables.c

@@ -1037,6 +1037,9 @@ table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add,
 		}
 	}
 
+	/* Get real OS error */
+	error = errno;
+
 	/* Report results back */
 	ptent = tent_buf;
 	for (i = 0; i < count; ptent++, i++) {
@@ -1089,8 +1092,6 @@ table_modify_record(ipfw_obj_header *oh, int ac, char *av[], int add,
 
 	if (error == 0)
 		return;
-	/* Get real OS error */
-	error = errno;
 
 	/* Try to provide more human-readable error */
 	switch (error) {