! fix crash in X-Preferences API; return NULL if not found.

diff --git a/webcit/preferences.c b/webcit/preferences.c
index e56100900975d48fae2ecff8eb6089d5899cc0ec..fae98f03a8bfeb0fd2cf2e4b9bc00a3986389ab8 100644 (file)
--- a/webcit/preferences.c
+++ b/webcit/preferences.c
@@ -512,6 +512,7 @@ int get_room_prefs_backend(const char *key, size_t keylen,
 const StrBuf *get_X_PREFS(const char *key, size_t keylen, 
                          const char *xkey, size_t xkeylen)
 {
+       int ret;
        StrBuf *pref_name;
        Preference *Prf;
        
@@ -520,10 +521,12 @@ const StrBuf *get_X_PREFS(const char *key, size_t keylen,
        StrBufAppendBufPlain(pref_name, HKEY(":"), 0);
        StrBufAppendBufPlain(pref_name, key, keylen, 0);
 
-       get_pref_backend(SKEY(pref_name), &Prf);
+       ret = get_pref_backend(SKEY(pref_name), &Prf);
        FreeStrBuf(&pref_name);
 
-       return Prf->Val;
+       if (ret)
+               return Prf->Val;
+       else return NULL;
 }
 
 void set_X_PREFS(const char *key, size_t keylen, const char *xkey, size_t xkeylen, StrBuf *value, int save_to_server)