patch 8.0.1601: highlight test fails on Win32

Problem:    Highlight test fails on Win32.
Solution:   Check for vtp and vcon support.
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 1620efe..6076b03 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -6198,6 +6198,9 @@
 #ifdef FEAT_VREPLACE
 	"vreplace",
 #endif
+#ifdef FEAT_VTP
+	"vtp",
+#endif
 #ifdef FEAT_WILDIGN
 	"wildignore",
 #endif