gettextprop: check result of XGetTextProperty (undefined behaviour for XFree) - dwm

commit 99f78fa553f9ddb23fab73e47a408d66ca7f974c
parent a9b6a312a77b9cc81ca8b08a95c09e9f7948d7a6
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Fri,  3 Nov 2017 16:36:32 +0100

gettextprop: check result of XGetTextProperty (undefined behaviour for XFree)

Diffstat:
M dwm.c  | 3 +--

1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/dwm.c b/dwm.c
@@ -910,8 +910,7 @@ gettextprop(Window w, Atom atom, char *text, unsigned int size)
     if (!text || size == 0)
         return 0;
     text[0] = '\0';
-    XGetTextProperty(dpy, w, &name, atom);
-    if (!name.nitems)
+    if (!XGetTextProperty(dpy, w, &name, atom) || !name.nitems)
         return 0;
     if (name.encoding == XA_STRING)
         strncpy(text, (char *)name.value, size - 1);