Fix buffer overrun.

--- src/draw.cpp.orig	Tue Jan 20 13:58:35 2015
+++ src/draw.cpp	Tue Jan 20 13:58:54 2015
@@ -235,7 +235,7 @@ void Draw::drawInputModeButton(Window window, GC gc, R
     XCORE->setForeground(gc, background);
     XCORE->fillRectangle(window, gc, rect);
 
-    XPoint shadowButtonPoints[2];
+    XPoint shadowButtonPoints[3];
     shadowButtonPoints[0].x = rect->x() + 2 * FIGURE_DISTANCE;
     shadowButtonPoints[0].y = rect->y() + FIGURE_DISTANCE;
     shadowButtonPoints[1].x = rect->x() + 2 * FIGURE_DISTANCE;