Fixed Errors Tab Indexing Bug in the Debugger

FIxed bug with Errors tab in the Debugger using wrong index in the
tab container.

Also removed unused variable that was probably left behind.

editor/script_editor_debugger.cpp

@@ -1084,19 +1084,19 @@ void ScriptEditorDebugger::_notification(int p_what) {
 			if (error_count != last_error_count || warning_count != last_warning_count) {
 
 				if (error_count == 0 && warning_count == 0) {
-					error_tree->set_name(TTR("Errors"));
+					errors_tab->set_name(TTR("Errors"));
 					debugger_button->set_text(TTR("Debugger"));
 					debugger_button->set_icon(Ref<Texture>());
-					tabs->set_tab_icon(error_tree->get_index(), Ref<Texture>());
+					tabs->set_tab_icon(errors_tab->get_index(), Ref<Texture>());
 				} else {
-					error_tree->set_name(TTR("Errors") + " (" + itos(error_count + warning_count) + ")");
+					errors_tab->set_name(TTR("Errors") + " (" + itos(error_count + warning_count) + ")");
 					debugger_button->set_text(TTR("Debugger") + " (" + itos(error_count + warning_count) + ")");
 					if (error_count == 0) {
 						debugger_button->set_icon(get_icon("Warning", "EditorIcons"));
-						tabs->set_tab_icon(error_tree->get_index(), get_icon("Warning", "EditorIcons"));
+						tabs->set_tab_icon(errors_tab->get_index(), get_icon("Warning", "EditorIcons"));
 					} else {
 						debugger_button->set_icon(get_icon("Error", "EditorIcons"));
-						tabs->set_tab_icon(error_tree->get_index(), get_icon("Error", "EditorIcons"));
+						tabs->set_tab_icon(errors_tab->get_index(), get_icon("Error", "EditorIcons"));
 					}
 				}
 				last_error_count = error_count;
@@ -2054,11 +2054,11 @@ ScriptEditorDebugger::ScriptEditorDebugger(EditorNode *p_editor) {
 	}
 
 	{ //errors
-		VBoxContainer *errvb = memnew(VBoxContainer);
-		errvb->set_name(TTR("Errors"));
+		errors_tab = memnew(VBoxContainer);
+		errors_tab->set_name(TTR("Errors"));
 
 		HBoxContainer *errhb = memnew(HBoxContainer);
-		errvb->add_child(errhb);
+		errors_tab->add_child(errhb);
 
 		Button *expand_all = memnew(Button);
 		expand_all->set_text(TTR("Expand All"));
@@ -2093,13 +2093,13 @@ ScriptEditorDebugger::ScriptEditorDebugger(EditorNode *p_editor) {
 		error_tree->set_v_size_flags(SIZE_EXPAND_FILL);
 		error_tree->set_allow_rmb_select(true);
 		error_tree->connect("item_rmb_selected", this, "_error_tree_item_rmb_selected");
-		errvb->add_child(error_tree);
+		errors_tab->add_child(error_tree);
 
 		item_menu = memnew(PopupMenu);
 		item_menu->connect("id_pressed", this, "_item_menu_id_pressed");
 		error_tree->add_child(item_menu);
 
-		tabs->add_child(errvb);
+		tabs->add_child(errors_tab);
 	}
 
 	{ // remote scene tree

editor/script_editor_debugger.h

@@ -87,7 +87,7 @@ class ScriptEditorDebugger : public Control {
 	Map<ObjectID, ScriptEditorDebuggerInspectedObject *> remote_objects;
 	Set<ObjectID> unfold_cache;
 
-	HSplitContainer *error_split;
+	VBoxContainer *errors_tab;
 	Tree *error_tree;
 	Tree *inspect_scene_tree;
 	Button *clearbutton;