patch 7.4.2201
Problem: The sign column disappears when the last sign is deleted.
Solution: Add the 'signcolumn' option. (Christian Brabandt)
diff --git a/src/structs.h b/src/structs.h
index b56282f..2a64471 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -263,6 +263,10 @@
int wo_crb_save; /* 'cursorbind' state saved for diff mode*/
# define w_p_crb_save w_onebuf_opt.wo_crb_save
#endif
+#ifdef FEAT_SIGNS
+ char_u *wo_scl;
+# define w_p_scl w_onebuf_opt.wo_scl /* 'signcolumn' */
+#endif
#ifdef FEAT_EVAL
int wo_scriptID[WV_COUNT]; /* SIDs for window-local options */