Tidy rosterwin

src/ui/rosterwin.c

@@ -279,7 +279,10 @@ void
 rosterwin_roster(void)
 {
     ProfWin *console = wins_get_console();
-    if (console) {
+    if (!console) {
+        return;
+    }
+
     ProfLayoutSplit *layout = (ProfLayoutSplit*)console->layout;
     assert(layout->memcheck == LAYOUT_SPLIT_MEMCHECK);
 
@@ -344,4 +347,3 @@ rosterwin_roster(void)
     }
     prefs_free_string(by);
 }
-}