--- func_strings.c.orig	2008-08-15 16:06:59.000000000 +0200
+++ func_strings.c	2008-08-15 16:08:26.000000000 +0200
@@ -539,6 +539,7 @@
 			} else if (arg.format[i] == '%') {
 				/* Literal data to copy */
 				*bufptr++ = arg.format[i];
+				bufptr[1] = '\0';
 			} else {
 				/* Not supported */
 
@@ -559,6 +560,7 @@
 			} else {
 				/* Literal data to copy */
 				*bufptr++ = arg.format[i];
+				bufptr[1] = '\0';
 			}
 		}
 	}