CKEY in the action window scrolls the window so that the current frame

is in the center.

source/blender/include/BSE_drawipo.h

@@ -59,6 +59,7 @@ int in_ipo_buttons(void);
 void drawscroll(int disptype);
 void drawipo(void);
 
+void center_currframe(void);
 void scroll_ipobuts(void);
 int view2dzoom(unsigned short event);
 int view2dmove(unsigned short event);