Fixed disconnecting not connected signal

editor/editor_dir_dialog.cpp

@@ -95,7 +95,9 @@ void EditorDirDialog::_notification(int p_what) {
 	}
 
 	if (p_what == NOTIFICATION_EXIT_TREE) {
-		EditorFileSystem::get_singleton()->disconnect("filesystem_changed", this, "reload");
+		if (EditorFileSystem::get_singleton()->is_connected("filesystem_changed", this, "reload")) {
+			EditorFileSystem::get_singleton()->disconnect("filesystem_changed", this, "reload");
+		}
 	}
 
 	if (p_what == NOTIFICATION_VISIBILITY_CHANGED) {

editor/plugins/version_control_editor_plugin.cpp

@@ -397,8 +397,9 @@ void VersionControlEditorPlugin::clear_stage_area() {
 void VersionControlEditorPlugin::shut_down() {
 
 	if (EditorVCSInterface::get_singleton()) {
-
-		EditorFileSystem::get_singleton()->disconnect("filesystem_changed", this, "_refresh_stage_area");
+		if (EditorFileSystem::get_singleton()->is_connected("filesystem_changed", this, "_refresh_stage_area")) {
+			EditorFileSystem::get_singleton()->disconnect("filesystem_changed", this, "_refresh_stage_area");
+		}
 		EditorVCSInterface::get_singleton()->shut_down();
 		memdelete(EditorVCSInterface::get_singleton());
 		EditorVCSInterface::set_singleton(NULL);

scene/2d/cpu_particles_2d.cpp

@@ -1037,7 +1037,9 @@ void CPUParticles2D::_set_redraw(bool p_redraw) {
 
 		VS::get_singleton()->multimesh_set_visible_instances(multimesh, -1);
 	} else {
-		VS::get_singleton()->disconnect("frame_pre_draw", this, "_update_render_thread");
+		if (VS::get_singleton()->is_connected("frame_pre_draw", this, "_update_render_thread")) {
+			VS::get_singleton()->disconnect("frame_pre_draw", this, "_update_render_thread");
+		}
 		VS::get_singleton()->canvas_item_set_update_when_visible(get_canvas_item(), false);
 
 		VS::get_singleton()->multimesh_set_visible_instances(multimesh, 0);

scene/3d/cpu_particles.cpp

@@ -1124,7 +1124,9 @@ void CPUParticles::_set_redraw(bool p_redraw) {
 		VS::get_singleton()->instance_geometry_set_flag(get_instance(), VS::INSTANCE_FLAG_DRAW_NEXT_FRAME_IF_VISIBLE, true);
 		VS::get_singleton()->multimesh_set_visible_instances(multimesh, -1);
 	} else {
-		VS::get_singleton()->disconnect("frame_pre_draw", this, "_update_render_thread");
+		if (VS::get_singleton()->is_connected("frame_pre_draw", this, "_update_render_thread")) {
+			VS::get_singleton()->disconnect("frame_pre_draw", this, "_update_render_thread");
+		}
 		VS::get_singleton()->instance_geometry_set_flag(get_instance(), VS::INSTANCE_FLAG_DRAW_NEXT_FRAME_IF_VISIBLE, false);
 		VS::get_singleton()->multimesh_set_visible_instances(multimesh, 0);
 	}

scene/3d/soft_body.cpp

@@ -460,7 +460,9 @@ void SoftBody::update_physics_server() {
 	} else {
 
 		PhysicsServer::get_singleton()->soft_body_set_mesh(physics_rid, NULL);
-		VS::get_singleton()->disconnect("frame_pre_draw", this, "_draw_soft_mesh");
+		if (VS::get_singleton()->is_connected("frame_pre_draw", this, "_draw_soft_mesh")) {
+			VS::get_singleton()->disconnect("frame_pre_draw", this, "_draw_soft_mesh");
+		}
 	}
 }