Show the window in wxGLCanvasEGL tracing messages

This is useful when there is more than one window using EGL.

(cherry picked from commit 547fb15)

Author: vadz

src/unix/glegl.cpp

@@ -812,7 +812,7 @@ bool wxGLCanvasEGL::SwapBuffers()
             // Trying to draw on a hidden window is useless and can actually be
             // harmful if the compositor blocks in eglSwapBuffers() in this
             // case, so avoid it.
-            wxLogTrace(TRACE_EGL, "Not drawing hidden window");
+            wxLogTrace(TRACE_EGL, "Window %p is hidden, not drawing", this);
             return false;
         }
     }
@@ -825,7 +825,7 @@ bool wxGLCanvasEGL::SwapBuffers()
         // worst if we're called before the window is realized.
         if ( !m_readyToDraw )
         {
-            wxLogTrace(TRACE_EGL, "Not ready to draw yet");
+            wxLogTrace(TRACE_EGL, "Window %p is not not ready to draw yet", this);
             return false;
         }
 
@@ -838,7 +838,7 @@ bool wxGLCanvasEGL::SwapBuffers()
     }
 #endif // GDK_WINDOWING_WAYLAND
 
-    wxLogTrace(TRACE_EGL, "Swapping buffers");
+    wxLogTrace(TRACE_EGL, "Swapping buffers for window %p", this);
 
     return eglSwapBuffers(m_display, m_surface);
 }