Addressing issues with empty contact names

//FREEBIE

Signal/src/contact/ContactsManager.m

@@ -342,7 +342,11 @@ void onAddressBookChanged(ABAddressBookRef notifyAddressBook, CFDictionaryRef in
             nameToUse = contact.lastName;
         }
         
+        if (nameToUse.length >= 1) {
             return [[[nameToUse substringToIndex:1] uppercaseString] decomposedStringWithCompatibilityMapping];
+        } else{
+            return @" ";
+        }
     }];
 }