updated for version 7.4.669
Problem:    When netbeans is active the sign column always shows up.
Solution:   Only show the sign column once a sign has been added. (Xavier de
            Gaye)
diff --git a/src/screen.c b/src/screen.c
index fd15ad1..4e1fb36 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -2214,7 +2214,7 @@
 {
     return (wp->w_buffer->b_signlist != NULL
 # ifdef FEAT_NETBEANS_INTG
-			    || netbeans_active()
+				|| wp->w_buffer->b_has_sign_column
 # endif
 		    );
 }