Fix commands not being blocked properly

Author: firewolf8385

src/main/java/net/jadedmc/commandblockerpro/listeners/PlayerCommandPreprocessListener.java

@@ -65,7 +65,7 @@ public void onCommandSend(PlayerCommandPreprocessEvent event) {
                 plugin.getServer().getPluginManager().callEvent(commandBlockEvent);
 
                 // If the CommandBlockEvent is cancelled, allow the command to be processed.
-                if(!commandBlockEvent.isCancelled()) {
+                if(commandBlockEvent.isCancelled()) {
                     return;
                 }