fix perspective distort

Author: jcupitt

TODO

@@ -34,6 +34,9 @@
 
 	add copy_set to stdenv, and that uses vips_call9
 
+- perspective distort could have an "interpoplate" option (always bilinear
+  right now)
+
 - rename Image_type as Image_interpretation
 
 - add

share/nip4/start/_vips7compat.def

@@ -671,5 +671,11 @@ im_segment test
                 $segments => true
 	];
 
+im_transform in params ipol wrap
+	= vips_call9 "quadratic" [in, params] [
+                $interopolate => ipol
+        ];
+
+
 // add a lot more!
 

src/workspaceview.c

@@ -1210,11 +1210,8 @@ workspaceview_drag_end(GtkEventControllerMotion *self,
 
 			Subcolumn *old_scol = SUBCOLUMN(VOBJECT(wview->old_sview)->iobject);
 			Column *old_col = COLUMN(ICONTAINER(old_scol)->parent);
-			if (icontainer_get_n_children(ICONTAINER(old_scol)) == 0) {
-				printf("workspaceview_drag_end: destroying column %s\n",
-					IOBJECT(old_col)->name);
+			if (icontainer_get_n_children(ICONTAINER(old_scol)) == 0)
 				iobject_destroy(IOBJECT(old_col));
-			}
 
 			workspaceview_unfloat(wview);
 			workspace_queue_layout(ws);