grid: fix left or right tiled windows rendering oversize and over edges

The left and right tiled cases were supported by Mutter and special-cased by GTK3

src/grid/grid.c

@@ -342,11 +342,22 @@ gridCommonWindow (CompWindow *cw,
 		constrainSize (cw, &gs->desiredSlot, &gs->desiredRect);
 		DEBUG_RECT (gs->desiredRect);
 	    }
-
-	    xwc.x = gs->desiredRect.x - cw->clientFrame.left;
-	    xwc.y = gs->desiredRect.y - cw->clientFrame.top;
-	    xwc.width  = gs->desiredRect.width + cw->clientFrame.left + cw->clientFrame.right;
-	    xwc.height = gs->desiredRect.height + cw->clientFrame.top + cw->clientFrame.bottom;
+		/*tiled left or right: this worked without any changes here */
+        /*These are a special case with CSD apps due to GTK behavior */
+	    if (where == GridLeft || where == GridRight){
+	        xwc.x = gs->desiredRect.x;
+	        xwc.y = gs->desiredRect.y;
+	        xwc.width  = gs->desiredRect.width;
+	        xwc.height = gs->desiredRect.height;
+            }
+        /*Quarter-tiled, top-tiled, or bottom tiled */
+		/*FIXME: in the top and bottom tiled cases width set here is NOT applied */
+        else{
+	        xwc.x = gs->desiredRect.x - cw->clientFrame.left;
+	        xwc.y = gs->desiredRect.y - cw->clientFrame.top;
+	        xwc.width  = gs->desiredRect.width + cw->clientFrame.left + cw->clientFrame.right;
+	        xwc.height = gs->desiredRect.height + cw->clientFrame.top + cw->clientFrame.bottom;
+            }
 
 	    if (cw->mapNum)
 		sendSyncRequest (cw);