Fix resizing PaintCanvas.

modules/paint/paint_canvas.cpp

@@ -533,6 +533,9 @@ void PaintCanvas::resize(int width, int height) {
 		height = 1;
 	}
 
+	_canvas_width = width;
+	_canvas_height = height;
+
 	Size2 s;
 	s.x = _canvas_height * _pixel_size;
 	s.y = _canvas_width * _pixel_size;

modules/paint/paint_visual_grid.cpp

@@ -102,7 +102,7 @@ void PaintVisualGrid::_notification(int p_what) {
 PaintVisualGrid::PaintVisualGrid() {
 	color = Color(1, 1, 1, 0.42);
 	size = 16;
-	zoom = 0;
+	//zoom = 0;
 }
 
 PaintVisualGrid::~PaintVisualGrid() {

modules/paint/paint_visual_grid.h

@@ -40,8 +40,8 @@ public:
 
 	Color color;
 	int size;
-	float zoom;
-	Vector2 offset;
+	//float zoom;
+	//Vector2 offset;
 
 protected:
 	void _notification(int p_what);