Index: trunk/Ohana/src/kapa2/include/structures.h
===================================================================
--- trunk/Ohana/src/kapa2/include/structures.h	(revision 38986)
+++ trunk/Ohana/src/kapa2/include/structures.h	(revision 39457)
@@ -55,5 +55,5 @@
   int      x, y, dx, dy;      /* position and size */
   int      width, height;     /* size of the bitmap */
-  char    *bitmap;            /* picture on button */
+  unsigned char *bitmap;            /* picture on button */
   int    (*function_1) ();    /* mouse_button 1 function */
   int    (*function_2) ();    /* mouse_button 2 function */