if setAvatar to null, dont check blocked media

Phillip Davis created 

codepath is deleteAvatar, which is setAvatar(from, null)

Change summary

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java | 3 
1 file changed, 2 insertions(+), 1 deletion(-)

Detailed changes

src/main/java/eu/siacs/conversations/services/XmppConnectionService.java 🔗 

@@ -509,7 +509,8 @@ public class XmppConnectionService extends Service {
         return databaseBackend.isBlockedMedia(cid);
     }
 
-    public boolean isBlockedMediaSha1(final String sha1sum) {
+    public boolean isBlockedMediaSha1(@Nullable final String sha1sum) {
+        if (sha1sum == null) return false;
         try {
             return isBlockedMedia(CryptoHelper.cid(CryptoHelper.hexToBytes(sha1sum), "sha-1"));
         } catch (final NoSuchAlgorithmException e) {