language.c fix possible buffer overrun

ensure zero termination regardless of data read from lang file

Change-Id: I0da0e787ffb10c9268557812b061cc3c452fbd0a

apps/language.c

@@ -86,7 +86,7 @@ int lang_load(const char *filename, const unsigned char *builtin,
             lang_init(builtin, dest, max_id);
             lseek(fd, foffset, SEEK_SET);
             read(fd, buffer, lang_size);
-
+            buffer[max_lang_size - 1] = '\0'; /* ensure buffer is null terminated */
             while(lang_size>3) {
                 id = ((buffer[0]<<8) | buffer[1]); /* get two-byte id */
                 buffer += 2;                       /* pass the id */