updated for version 7.3.593
Problem:    No easy way to decide if b:browsefilter will work.
Solution:   Add the browsefilter feature.
diff --git a/src/eval.c b/src/eval.c
index b2ab0ad..5fc32e2 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -12044,6 +12044,11 @@
 	"all_builtin_terms",
 # endif
 #endif
+#if defined(FEAT_BROWSE) && (defined(USE_FILE_CHOOSER) \
+	|| defined(FEAT_GUI_W32) \
+	|| defined(FEAT_GUI_MOTIF))
+	"browsefilter",
+#endif
 #ifdef FEAT_BYTEOFF
 	"byte_offset",
 #endif