Fix a few crashes and leaks when cloning C strings.

* alloc.c, lisp.h (dupstring): New function.
* gtkutil.c (xg_get_font):
* term.c (tty_default_color_capabilities):
* xsettings.c (store_monospaced_changed)
(store_font_name_changed, parse_settings)
(read_and_apply_settings, init_gsettings, init_gconf): Use it.
This avoids some unlikely crashes due to accessing freed storage,
and avoids some minor memory leaks in the more-typical case.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index a7e80a41c28..2f9a30fdfe9 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -4398,6 +4398,7 @@ extern void *xpalloc (void *, ptrdiff_t *, ptrdiff_t, ptrdiff_t, ptrdiff_t);
 
 extern char *xstrdup (const char *);
 extern char *xlispstrdup (Lisp_Object);
+extern void dupstring (char **, char const *);
 extern void xputenv (const char *);
 
 extern char *egetenv (const char *);