Git: Ignore unknown push failures

Pushing to Gerrit can fail with due to missing
Change-Id. In that case, none of the existing
warnings should appear.

Change-Id: I4bf55d35a792b680e3ae524e116ce5db9fdd405a
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Miklós Márton <martonmiklosqdev@gmail.com>

src/plugins/git/gitclient.cpp

@@ -3108,6 +3108,8 @@ void GitClient::push(const QString &workingDirectory, const QStringList &pushArg
             this, [this, command, workingDirectory, pushArgs](bool success) {
         if (!success) {
             switch (static_cast<PushFailure>(command->cookie().toInt())) {
+            case Unknown:
+                break;
             case NonFastForward: {
                 const QColor warnColor = Utils::creatorTheme()->color(Theme::TextColorError);
                 if (QMessageBox::question(

src/plugins/git/gitclient.h

@@ -80,6 +80,7 @@ enum StashFlag {
 };
 
 enum PushFailure {
+    Unknown,
     NonFastForward,
     NoRemoteBranch
 };