patch 8.0.0369: a few options are not defined, depending on features

Problem:    The 'balloondelay', 'ballooneval' and 'balloonexpr' options are
            not defined without the +balloon_eval feature. Testing that an
            option value fails does not work for unsupported options.
Solution:   Make the options defined but not supported.  Don't test if
            setting unsupported options fails.
diff --git a/src/option.c b/src/option.c
index 4ba4363..5a8af31 100644
--- a/src/option.c
+++ b/src/option.c
@@ -624,19 +624,33 @@
 			    {(char_u *)0L, (char_u *)0L}
 #endif
 			    SCRIPTID_INIT},
-#ifdef FEAT_BEVAL
     {"balloondelay","bdlay",P_NUM|P_VI_DEF,
+#ifdef FEAT_BEVAL
 			    (char_u *)&p_bdlay, PV_NONE,
-			    {(char_u *)600L, (char_u *)0L} SCRIPTID_INIT},
-    {"ballooneval", "beval",P_BOOL|P_VI_DEF|P_NO_MKRC,
-			    (char_u *)&p_beval, PV_NONE,
-			    {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},
-# ifdef FEAT_EVAL
-    {"balloonexpr", "bexpr", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
-			    (char_u *)&p_bexpr, PV_BEXPR,
-			    {(char_u *)"", (char_u *)0L} SCRIPTID_INIT},
-# endif
+			    {(char_u *)600L, (char_u *)0L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)0L, (char_u *)0L}
 #endif
+			    SCRIPTID_INIT},
+    {"ballooneval", "beval",P_BOOL|P_VI_DEF|P_NO_MKRC,
+#ifdef FEAT_BEVAL
+			    (char_u *)&p_beval, PV_NONE,
+			    {(char_u *)FALSE, (char_u *)0L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)0L, (char_u *)0L}
+#endif
+			    SCRIPTID_INIT},
+    {"balloonexpr", "bexpr", P_STRING|P_ALLOCED|P_VI_DEF|P_VIM,
+#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
+			    (char_u *)&p_bexpr, PV_BEXPR,
+			    {(char_u *)"", (char_u *)0L}
+#else
+			    (char_u *)NULL, PV_NONE,
+			    {(char_u *)0L, (char_u *)0L}
+#endif
+			    SCRIPTID_INIT},
     {"beautify",    "bf",   P_BOOL|P_VI_DEF,
 			    (char_u *)NULL, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)0L} SCRIPTID_INIT},