Patch for Oracle bug 15797932

Submitted upstream as: https://github.com/brltty/brltty/pull/72

--- brltty-4.2/Drivers/Braille/VisioBraille/vstp_main.c 2010-05-04 20:42:36.000000000 +0800

+++ brltty-4.2/Drivers/Braille/VisioBraille/vstp_main.c.mod 2012-06-14 00:11:33.561690986 +0800

@@ -99,7 +99,7 @@

} else if (!strcmp(s,"vbs_ext")) {

visiobases_ext = (char *) malloc(5);

strncpy(visiobases_ext,c,4);

- visiobases_ext[5]=0;

+ visiobases_ext[4]=0;

} else if (!strcmp(s,"vbs_dir")) {

visiobases_dir = (char *) malloc(strlen(c)+1);

strcpy(visiobases_dir,c);