Update InstallerItem.java

Author: ShirosakiMio

FCL/src/main/java/com/tungsten/fcl/ui/InstallerItem.java

@@ -290,7 +290,10 @@ public void onClick(View view) {
                 }
             }
             if (view == remove) {
-                installerItem.removeAction.get().run();
+                Runnable runnable = installerItem.removeAction.get();
+                if (runnable != null) {
+                    runnable.run();
+                }
             }
         }
     }