kwin: add a GLVertexBuffer::draw() overload

This overload doesn't take a clip region. Added for symmetry
with the render() method.

libkwineffects/kwinglutils.cpp

@@ -1886,6 +1886,11 @@ void GLVertexBuffer::unbindArrays()
     d->unbindArrays();
 }
 
+void GLVertexBuffer::draw(GLenum primitiveMode, int first, int count)
+{
+    draw(infiniteRegion(), primitiveMode, first, count, false);
+}
+
 void GLVertexBuffer::draw(const QRegion &region, GLenum primitiveMode, int first, int count, bool hardwareClipping)
 {
 #ifndef KWIN_HAVE_OPENGLES

libkwineffects/kwinglutils.h

@@ -717,6 +717,11 @@ public:
      */
     void unbindArrays();
 
+    /**
+     * Draws count vertices beginning with first.
+     */
+    void draw(GLenum primitiveMode, int first, int count);
+
     /**
      * Draws count vertices beginning with first.
      */