patch 8.1.1408: PFL_HIDDEN conflicts with system header file
Problem: PFL_HIDDEN conflicts with system header file.
Solution: Rename to POPF_HIDDEN.
diff --git a/src/vim.h b/src/vim.h
index a52ba5e..42a415a 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -614,8 +614,8 @@
#define VALID_TOPLINE 0x80 // w_topline is valid (for cursor position)
// Values for w_popup_flags.
-#define PFL_HIDDEN 1 // popup is not displayed
-#define PFL_REDRAWN 2 // popup was just redrawn
+#define POPF_HIDDEN 1 // popup is not displayed
+#define POPF_REDRAWN 2 // popup was just redrawn
/*
* Terminal highlighting attribute bits.