browser: redo the layout only when an actual resize occurred

This improves upon the previous commit.

This fixes https://savannah.gnu.org/bugs/?67294 in a better way.

src/browser.c

@@ -421,6 +421,10 @@ char *browse(char *path)
 		dir = NULL;
 	}
 
+#ifndef NANO_TINY
+	resized_for_browser = FALSE;
+#endif
+
 	/* If something was selected before, reselect it;
 	 * otherwise, just select the first item (..). */
 	if (present_name != NULL) {
@@ -644,8 +648,7 @@ char *browse(char *path)
   rearrange:
 #ifndef NANO_TINY
 		/* If the terminal resized (or might have), refresh the file list. */
-		if (kbinput == THE_WINDOW_RESIZED || function == do_help || function == goto_dir ||
-						function == do_search_backward || function == do_search_forward) {
+		if (kbinput == THE_WINDOW_RESIZED || resized_for_browser) {
 			/* Remember the selected file, to be able to reselect it. */
 			present_name = copy_of(filelist[selected]);
 			goto read_directory_contents;

src/global.c

@@ -30,6 +30,8 @@
 #ifndef NANO_TINY
 volatile sig_atomic_t the_window_resized = FALSE;
 		/* Set to TRUE by the handler whenever a SIGWINCH occurs. */
+volatile sig_atomic_t resized_for_browser = FALSE;
+		/* Same as above, but used by the file browser. */
 #endif
 
 bool on_a_vt = FALSE;

src/nano.c

@@ -1049,6 +1049,7 @@ void handle_sigwinch(int signal)
 {
 	/* Let the input routine know that a SIGWINCH has occurred. */
 	the_window_resized = TRUE;
+	resized_for_browser = TRUE;
 }
 
 /* Reinitialize and redraw the screen completely. */

src/prototypes.h

@@ -24,6 +24,7 @@
 
 #ifndef NANO_TINY
 extern volatile sig_atomic_t the_window_resized;
+extern volatile sig_atomic_t resized_for_browser;
 #endif
 
 extern bool on_a_vt;