Prevent flashing older builds

openwrtBuild

@@ -354,9 +354,10 @@ __main() {
     installPrerequisites
     acquireImageBuilder
     extractImageBuilder
-    makeImage
-    [[ -n $_ssh_upgrade_path ]] && sshUpgrade
-    [[ -n $_flash_dev ]] && flashImage
+    if makeImage; then
+        [[ -n $_ssh_upgrade_path ]] && sshUpgrade
+        [[ -n $_flash_dev ]] && flashImage
+    fi
 }
 
 __main "$@"