null check when cleaning avatars for muc

1 files changed, 5 insertions, 2 deletions

diff --git a/src/main/java/de/pixart/messenger/services/AvatarService.java b/src/main/java/de/pixart/messenger/services/AvatarService.java
index f38102866..81afa9342 100644
--- a/src/main/java/de/pixart/messenger/services/AvatarService.java
+++ b/src/main/java/de/pixart/messenger/services/AvatarService.java
@@ -333,7 +333,10 @@ public class AvatarService implements OnAdvancedStreamFeaturesLoaded {
         return bitmap;
     }
 
-    public void clear(MucOptions options) {
+    public void clear(final MucOptions options) {
+        if (options == null) {
+            return;
+        }
         synchronized (this.sizes) {
             for (Integer size : sizes) {
                 this.mXmppConnectionService.getBitmapCache().remove(key(options, size));
@@ -341,7 +344,7 @@ public class AvatarService implements OnAdvancedStreamFeaturesLoaded {
         }
     }
 
-    private String key(MucOptions options, int size) {
+    private String key(final MucOptions options, int size) {
         synchronized (this.sizes) {
             if (!this.sizes.contains(size)) {
                 this.sizes.add(size);