Fixed broken photo viewer after main activity destroy

TMessagesProj/build.gradle

@@ -83,7 +83,7 @@ android {
     defaultConfig {
         minSdkVersion 8
         targetSdkVersion 19
-        versionCode 274
+        versionCode 275
         versionName "1.6.0"
     }
 }

TMessagesProj/src/main/java/org/telegram/ui/LaunchActivity.java

@@ -500,6 +500,7 @@ public class LaunchActivity extends ActionBarActivity implements NotificationCen
 
     @Override
     protected void onDestroy() {
+        PhotoViewer.getInstance().destroyPhotoViewer();
         super.onDestroy();
         onFinish();
     }

TMessagesProj/src/main/java/org/telegram/ui/PhotoViewer.java

@@ -1697,6 +1697,22 @@ public class PhotoViewer implements NotificationCenter.NotificationCenterDelegat
         }
     }
 
+    public void destroyPhotoViewer() {
+        if (parentActivity == null || windowView == null) {
+            return;
+        }
+        try {
+            WindowManager wm = (WindowManager) parentActivity.getSystemService(Context.WINDOW_SERVICE);
+            if (windowView.getParent() != null) {
+                wm.removeViewImmediate(windowView);
+            }
+            windowView = null;
+        } catch (Exception e) {
+            FileLog.e("tmessages", e);
+        }
+        Instance = null;
+    }
+
     private void onPhotoClosed(PlaceProviderObject object) {
         disableShowCheck = true;
         currentMessageObject = null;