src/gnutls.c: Fix previous change.

(init_gnutls_functions): Protect against (unlikely) manipulation
of :loaded-from data.

src/ChangeLog

+2012-04-24  Juanma Barranquero  <lekktu@gmail.com>
+
+	* gnutls.c (init_gnutls_functions): Protect against (unlikely)
+	manipulation of :loaded-from data.
+
 2012-04-23  Juanma Barranquero  <lekktu@gmail.com>
 
 	* gnutls.c (init_gnutls_functions): The value of :loaded-from is

src/gnutls.c

@@ -200,8 +200,12 @@ init_gnutls_functions (Lisp_Object libraries)
 
   max_log_level = global_gnutls_log_level;
 
-  GNUTLS_LOG2 (1, max_log_level, "GnuTLS library loaded:",
-	       SDATA (XCAR (Fget (Qgnutls_dll, QCloaded_from))));
+  {
+    Lisp_Object name = CAR_SAFE (Fget (Qgnutls_dll, QCloaded_from));
+    GNUTLS_LOG2 (1, max_log_level, "GnuTLS library loaded:",
+                 STRINGP (name) ? (const char *) SDATA (name) : "unknown");
+  }
+
   return 1;
 }