Fix DSSI UIs closing prematurely

distrho/src/DistrhoUIDSSI.cpp

@@ -95,6 +95,7 @@ public:
     UIDssi(const OscData& oscData, const char* const uiTitle)
         : fUI(this, 0, nullptr, setParameterCallback, setStateCallback, sendNoteCallback, setSizeCallback),
           fHostClosed(false),
+          fShowCalled(false),
           fOscData(oscData)
     {
         fUI.setTitle(uiTitle);
@@ -113,6 +114,12 @@ public:
             fOscData.idle();
 
             if (! fUI.idle())
+            {
+                // host might not have called show yet
+                if (fShowCalled)
+                    break;
+            }
+            else if (fHostClosed)
                 break;
 
             d_msleep(30);
@@ -142,6 +149,7 @@ public:
 
     void dssiui_show()
     {
+        fShowCalled = true;
         fUI.setVisible(true);
     }
 
@@ -196,6 +204,7 @@ protected:
 private:
     UIExporter fUI;
     bool fHostClosed;
+    bool fShowCalled;
 
     const OscData& fOscData;