patch 9.0.0144: text property cannot override 'cursorline' highlight
Problem: Text property cannot override 'cursorline' highlight.
Solution: Add the "override" flag to prop_type_add(). (closes #5533,
closes #8225).
diff --git a/src/structs.h b/src/structs.h
index e6b9f0d..5b05c64 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -834,6 +834,7 @@
#define PT_FLAG_INS_START_INCL 1 // insert at start included in property
#define PT_FLAG_INS_END_INCL 2 // insert at end included in property
#define PT_FLAG_COMBINE 4 // combine with syntax highlight
+#define PT_FLAG_OVERRIDE 8 // override any highlight
// Sign group
typedef struct signgroup_S