Bug fix (from own collection)

After using clip-safe pixeldraw from glutil.c (preview render, bg picture)
the current viewport had to be re-set. Not doing so caused a 1 pixel offset
for live updates buttons (on mouse over)

source/blender/src/drawview.c

@@ -447,6 +447,7 @@ static void draw_bgpic(void)
 	glDisable(GL_BLEND);
 	if(G.zbuf) glEnable(GL_DEPTH_TEST);
 	
+	areawinset(curarea->win);	// restore viewport / scissor
 }
 
 void timestr(double time, char *str)

source/blender/src/previewrender.c

@@ -276,6 +276,9 @@ static void end_previewrect(void)
 	glPopMatrix();
 	
 	glPixelZoom(1.0, 1.0);
+	
+	areawinset(curarea->win);	// restore viewport / scissor
+
 }
 
 static void display_pr_scanline(unsigned int *rect, int recty)