patch 8.1.0795: cannot build without popup menu
Problem: Cannot build without popup menu.
Solution: Add #ifdef
diff --git a/src/ex_getln.c b/src/ex_getln.c
index 9400b20..f7dfc32 100644
--- a/src/ex_getln.c
+++ b/src/ex_getln.c
@@ -7268,9 +7268,11 @@
/* Don't execute autocommands while creating the window. */
block_autocmds();
+#if defined(FEAT_INS_EXPAND)
// When using completion in Insert mode with <C-R>=<C-F> one can open the
// command line window, but we don't want the popup menu then.
pum_undisplay();
+#endif
/* don't use a new tab page */
cmdmod.tab = 0;