help: after a search, show the cursor only when something was found

And hide the cursor again as soon as the user scrolls.
Achieve this through making the 'didfind' variable global.

Also, remove a superfluous call of wnoutrefresh(), as bottombars()
already does that.

This fixes https://savannah.gnu.org/bugs/?50918.
Reported-by: David Lawrence Ramsey <pooka109@gmail.com>

src/global.c

@@ -68,6 +68,9 @@ bool inhelp = FALSE;
 char *title = NULL;
 	/* When not NULL: the title of the current help text. */
 
+int didfind = 0;
+	/* Whether the last search found something. */
+
 int controlleft, controlright, controlup, controldown, controlhome, controlend;
 #ifndef NANO_TINY
 int shiftcontrolleft, shiftcontrolright, shiftcontrolup, shiftcontroldown;

src/help.c

@@ -183,6 +183,7 @@ void do_help(void)
     while (TRUE) {
 	lastmessage = HUSH;
 	focusing = TRUE;
+	didfind = 0;
 
 	kbinput = get_kbinput(edit);
 
@@ -207,12 +208,9 @@ void do_help(void)
 	} else if (func == do_search) {
 	    do_search();
 	    bottombars(MHELP);
-	    wnoutrefresh(bottomwin);
-	    curs_set(1);
 	} else if (func == do_research) {
 	    do_research();
 	    currmenu = MHELP;
-	    curs_set(1);
 #ifndef NANO_TINY
 	} else if (kbinput == KEY_WINCH) {
 	    ; /* Nothing to do. */
@@ -229,6 +227,12 @@ void do_help(void)
 	} else
 	    unbound_key(kbinput);
 
+	/* If we searched and found something, let the cursor show it. */
+	if (didfind == 1)
+	    curs_set(1);
+	else
+	    curs_set(0);
+
 	edit_refresh();
 
 	location = 0;

src/proto.h

@@ -54,6 +54,8 @@ extern filestruct *pletion_line;
 extern bool inhelp;
 extern char *title;
 
+extern int didfind;
+
 extern int controlleft;
 extern int controlright;
 extern int controlup;

src/search.c

@@ -438,7 +438,6 @@ void go_looking(void)
 {
     filestruct *was_current = openfile->current;
     size_t was_current_x = openfile->current_x;
-    int didfind;
 #ifdef DEBUG
     clock_t start = clock();
 #endif