patch 9.0.1993: warning about unused function definition

Problem:  warning about unused function definition
Solution: add ifdefs

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/optionstr.c

@@ -849,6 +849,7 @@ expand_set_opt_generic(
     return ret;
 }
 
+# if defined(FEAT_GUI_MSWIN) || defined(FEAT_GUI_GTK)
 static garray_T *expand_cb_ga;
 static optexpand_T *expand_cb_args;
 
@@ -938,6 +939,7 @@ expand_set_opt_callback(
     *numMatches = ga.ga_len;
     return OK;
 }
+#endif
 
 /*
  * Expand an option which is a list of flags.

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1993,
 /**/
     1992,
 /**/