lxc: Fix wrong VIR_FREE after a return statement

There is a VIR_FREE after a return statement. That code section is never
executed and for this reason the "tty" variable is not being freed. This
commit rearranges the logic.
Signed-off-by: NJulio Faracco <jcfaracco@gmail.com>

src/lxc/lxc_container.c

@@ -1143,8 +1143,8 @@ static int lxcContainerSetupDevices(char **ttyPaths, size_t nttyPaths)
             return -1;
 
         if (virFileBindMountDevice(ttyPaths[i], tty) < 0) {
-            return -1;
             VIR_FREE(tty);
+            return -1;
         }
 
         VIR_FREE(tty);