patch 8.2.3837: QNX: crash when compiled with GUI but using terminal

Problem:    QNX: crash when compiled with GUI but using terminal.
Solution:   Check gui.in_use is set. (Hirohito Higashi, closes #9363)
diff --git a/src/autocmd.c b/src/autocmd.c
index 305679c..789dde1 100644
--- a/src/autocmd.c
+++ b/src/autocmd.c
@@ -1613,10 +1613,15 @@
 #endif
 	}
 #if defined(FEAT_GUI)
-	// Hide the scrollbars from the aucmd_win and update.
-	gui_mch_enable_scrollbar(&aucmd_win->w_scrollbars[SBAR_LEFT], FALSE);
-	gui_mch_enable_scrollbar(&aucmd_win->w_scrollbars[SBAR_RIGHT], FALSE);
-	gui_may_update_scrollbars();
+	if (gui.in_use)
+	{
+	    // Hide the scrollbars from the aucmd_win and update.
+	    gui_mch_enable_scrollbar(
+				   &aucmd_win->w_scrollbars[SBAR_LEFT], FALSE);
+	    gui_mch_enable_scrollbar(
+				  &aucmd_win->w_scrollbars[SBAR_RIGHT], FALSE);
+	    gui_may_update_scrollbars();
+	}
 #endif
     }
     else
diff --git a/src/version.c b/src/version.c
index 22f97ea..aafa3d8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3837,
+/**/
     3836,
 /**/
     3835,