disable continuous grab in the header, its more annoying then useful.

also NULL texture's point density tree data when copying to prevent possible double free.

source/blender/blenkernel/intern/texture.c

@@ -798,6 +798,7 @@ Tex *localize_texture(Tex *tex)
 	if(texn->pd) {
 		texn->pd= MEM_dupallocN(texn->pd);
 		if(texn->pd->coba) {
+			texn->pd->point_tree = NULL;
 			texn->pd->coba= MEM_dupallocN(texn->pd->coba);
 		}
 

source/blender/windowmanager/intern/wm_event_system.c

@@ -726,6 +726,14 @@ static int wm_operator_invoke(bContext *C, wmOperatorType *ot, wmEvent *event, P
 					wrap = (U.uiflag & USER_CONTINUOUS_MOUSE) && ((op->flag & OP_GRAB_POINTER) || (ot->flag & OPTYPE_GRAB_POINTER));
 				}
 
+				/* exception, cont. grab in header is annoying */
+				if(wrap) {
+					ARegion *ar= CTX_wm_region(C);
+					if(ar && ar->regiontype == RGN_TYPE_HEADER) {
+						wrap= FALSE;
+					}
+				}
+
 				if(wrap) {
 					rcti *winrect= NULL;
 					ARegion *ar= CTX_wm_region(C);