patch 8.0.1312: balloon_show() only works in terminal when compiled with GUI
Problem: balloon_show() only works in terminal when compiled with the GUI.
Solution: Add FEAT_BEVAL_GUI and refactor to move common code out of the GUI
specific file.
diff --git a/src/globals.h b/src/globals.h
index c198664..b479579 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1649,7 +1649,7 @@
EXTERN int timer_busy INIT(= 0); /* when timer is inside vgetc() then > 0 */
#endif
-#ifdef FEAT_BEVALTERM
+#ifdef FEAT_BEVAL_TERM
EXTERN int bevalexpr_due_set INIT(= FALSE);
EXTERN proftime_T bevalexpr_due;
#endif