Fix a few compiler warnings.  Fix crash with encrypted undo file.
diff --git a/src/gui_beval.c b/src/gui_beval.c
index 123b6fd..90bef8b 100644
--- a/src/gui_beval.c
+++ b/src/gui_beval.c
@@ -20,6 +20,7 @@
     BalloonEval *beval;
     int		state UNUSED;
 {
+#ifdef FEAT_EVAL
     win_T	*wp;
     int		col;
     int		use_sandbox;
@@ -29,8 +30,9 @@
     long	winnr = 0;
     char_u	*bexpr;
     buf_T	*save_curbuf;
-#ifdef FEAT_WINDOWS
+# ifdef FEAT_WINDOWS
     win_T	*cw;
+# endif
 #endif
     static int	recursive = FALSE;