Made BGLView by default freely resizable by layout manager. I'm not sure I didn't break binary compatibility, please review.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35806 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/opengl/GLView.h

@@ -79,6 +79,9 @@ virtual status_t    GetSupportedSuites(BMessage *data);
 			void	EnableDirectMode(bool enabled);
 
 			void*	getGC()	{ return fGc; } // ???
+			
+	virtual void	GetPreferredSize(float* width, float* height);
+	
 private:
 
 	virtual void	_ReservedGLView1();

src/kits/opengl/GLView.cpp

@@ -302,6 +302,16 @@ BGLView::SetResizingMode(uint32 mode)
 }
 
 
+void
+BGLView::GetPreferredSize(float* _width, float* _height)
+{
+	if (_width)
+		*_width = 0;
+	if (_height)
+		*_height = 0;
+}
+
+
 void
 BGLView::Show()
 {