Fix Trigger Builder Msg ID crash and Frame Sender not triggering on receipt of specific message ID

- Fixed null pointer crash when accessing DBC message signals in Trigger Builder
- Fixed Frame Sender window not properly triggering on incoming frames with specific message IDs
- Added proper signal null checks and ID trigger condition handling
- Incremented version to 242

triggerdialog.cpp

@@ -9,6 +9,9 @@ TriggerDialog::TriggerDialog(QList<Trigger> trigs, QWidget *parent) :
     ui->setupUi(this);
     triggers.clear();
     triggers.append(trigs); //make sure it's just a clone of the existing triggers
+    
+    // Set wider minimum width for Msg ID combo box to accommodate extended IDs
+    ui->cmMsgID->setMinimumWidth(250);
 
     //if there are no triggers then create a default one
     if (triggers.count() == 0)
@@ -184,15 +187,20 @@ void TriggerDialog::regenerateCurrentListItem()
             //the right message. Should at least search by message name instead
             //if possible.
             DBC_MESSAGE *msg = dbcHandler->findMessage(trig.ID);
-            int numSigs = msg->sigHandler->getCount();
-            for (int s = 0; s < numSigs; s++)
+            if (msg)
             {
-                DBC_SIGNAL *sig = msg->sigHandler->findSignalByIdx(s);
-
-                entries.append(sig->name);
+                int numSigs = msg->sigHandler->getCount();
+                for (int s = 0; s < numSigs; s++)
+                {
+                    DBC_SIGNAL *sig = msg->sigHandler->findSignalByIdx(s);
+                    if (sig)
+                    {
+                        entries.append(sig->name);
+                    }
+                }
+                entries.sort();
+                ui->cmSignal->addItems(entries);
             }
-            entries.sort();
-            ui->cmSignal->addItems(entries);
         }
     }