Fix external UI build (#87)

* Fix external UI build

* Use default bool parameter in setWindowSize (non-DGL version)

distrho/DistrhoUI.hpp

@@ -67,12 +67,14 @@ public:
     */
     bool isUserResizable() const noexcept;
 
+#ifdef HAVE_DGL
    /**
       Set geometry constraints for the UI when resized by the user, and optionally scale UI automatically.
       @see Window::setGeometryConstraints(uint,uint,bool)
       @see Window::setScaling(double)
     */
     void setGeometryConstraints(uint minWidth, uint minHeight, bool keepAspectRatio, bool automaticallyScale = false);
+#endif
 
    /* --------------------------------------------------------------------------------------------------------
     * Host state */

distrho/src/DistrhoUI.cpp

@@ -62,6 +62,7 @@ bool UI::isUserResizable() const noexcept
     return pData->userResizable;
 }
 
+#ifdef HAVE_DGL
 void UI::setGeometryConstraints(uint minWidth, uint minHeight, bool keepAspectRatio, bool automaticallyScale)
 {
     DISTRHO_SAFE_ASSERT_RETURN(minWidth > 0,);
@@ -72,7 +73,9 @@ void UI::setGeometryConstraints(uint minWidth, uint minHeight, bool keepAspectRa
     pData->minHeight = minHeight;
 
     getParentWindow().setGeometryConstraints(minWidth, minHeight, keepAspectRatio);
+
 }
+#endif
 
 /* ------------------------------------------------------------------------------------------------------------
  * Host state */

distrho/src/DistrhoUIInternal.hpp

@@ -460,7 +460,7 @@ public:
         return glWindow.handlePluginSpecial(press, key);
     }
 #else
-    void setWindowSize(const uint, const uint, const bool) {}
+    void setWindowSize(const uint, const uint, const bool = false) {}
     void setWindowTransientWinId(const uintptr_t) {}
     bool setWindowVisible(const bool) { return true; }
 #endif