--- openttd-0.5.2/gfx.c	2007-03-19 23:42:05.000000000 +0200
+++ openttd-0.5.2/gfx.c	2008-08-05 07:50:18.000000000 +0300
@@ -268,9 +268,11 @@ 
 			w += GetCharacterWidth(size, c);
 
 			if (w >= maxw) {
-				// string got too big... insert dotdotdot
-				ddd_pos[0] = ddd_pos[1] = ddd_pos[2] = '.';
-				ddd_pos[3] = '\0';
+				/* string got too big... insert dotdotdot, but make sure we do not
+				 * print anything beyond the string termination character. */
+				int i;
+				for (i = 0; *ddd_pos != '\0' && i < 3; i++, ddd_pos++) *ddd_pos = '.';
+				*ddd_pos = '\0';
 				return ddd_w;
 			}
 		} else {