Avoiding crashes in plugins if components get deleted during a paint callback

modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp

@@ -1051,7 +1051,8 @@ public:
                 Timer::callPendingTimersSynchronously();
 
                 for (int i = ComponentPeer::getNumPeers(); --i >= 0;)
-                    ComponentPeer::getPeer (i)->performAnyPendingRepaintsNow();
+                    if (ComponentPeer* p = ComponentPeer::getPeer(i))
+                        p->performAnyPendingRepaintsNow();
 
                 recursionCheck = false;
             }

modules/juce_audio_processors/format_types/juce_VST3PluginFormat.cpp

@@ -1655,7 +1655,6 @@ public:
         if (isControllerInitialised)    editController->terminate();
         if (isComponentInitialised)     component->terminate();
 
-        //Deletion order appears to matter:
         componentConnection = nullptr;
         editControllerConnection = nullptr;
         unitData = nullptr;
@@ -1667,6 +1666,8 @@ public:
         editController2 = nullptr;
         editController = nullptr;
         component = nullptr;
+        host = nullptr;
+        module = nullptr;
     }
 
     bool initialise()

modules/juce_audio_processors/format_types/juce_VSTPluginFormat.cpp

@@ -1285,7 +1285,8 @@ public:
                     handleUpdateNowIfNeeded();
 
                     for (int i = ComponentPeer::getNumPeers(); --i >= 0;)
-                        ComponentPeer::getPeer(i)->performAnyPendingRepaintsNow();
+                        if (ComponentPeer* p = ComponentPeer::getPeer(i))
+                            p->performAnyPendingRepaintsNow();
                 }
                 break;