patch 9.0.1330: handling new value of an option has a long "else if" chain
Problem: Handling new value of an option has a long "else if" chain.
Solution: Use a function pointer. (Yegappan Lakshmanan, closes #12015)
diff --git a/src/proto/hardcopy.pro b/src/proto/hardcopy.pro
index 615f088..8a8c73e 100644
--- a/src/proto/hardcopy.pro
+++ b/src/proto/hardcopy.pro
@@ -1,6 +1,6 @@
/* hardcopy.c */
-char *parse_printoptions(void);
-char *parse_printmbfont(void);
+char *parse_printoptions(optset_T *args);
+char *parse_printmbfont(optset_T *args);
int prt_header_height(void);
int prt_use_number(void);
int prt_get_unit(int idx);