Fix metatile behaviors with no constant not displaying

CHANGELOG.md

@@ -58,6 +58,7 @@ The **"Breaking Changes"** listed below are changes that have been made in the d
 - Fix drawing large amounts of text with the scripting API causing a significant drop in performance.
 - Silence unnecessary error logging when parsing C defines Porymap doesn't use.
 - Fix some windows like the Tileset Editor not raising to the front when reactivated.
+- Metatile behaviors with no constant will now display their value in the Tileset Editor.
 
 ## [4.5.0] - 2021-12-26
 ### Added

src/ui/tileseteditor.cpp

@@ -353,7 +353,13 @@ void TilesetEditor::onSelectedMetatileChanged(uint16_t metatileId) {
     this->metatileLayersItem->setMetatile(metatile);
     this->metatileLayersItem->draw();
     this->ui->graphicsView_metatileLayers->setFixedSize(this->metatileLayersItem->pixmap().width() + 2, this->metatileLayersItem->pixmap().height() + 2);
-    this->ui->comboBox_metatileBehaviors->setCurrentIndex(this->ui->comboBox_metatileBehaviors->findData(this->metatile->behavior));
+
+    int index = this->ui->comboBox_metatileBehaviors->findData(this->metatile->behavior);
+    if (index != -1)
+        this->ui->comboBox_metatileBehaviors->setCurrentIndex(index);
+    else
+        this->ui->comboBox_metatileBehaviors->setCurrentText(QString::number(this->metatile->behavior));
+
     this->ui->lineEdit_metatileLabel->setText(this->metatile->label);
     if (!projectConfig.getTripleLayerMetatilesEnabled()) {
         this->ui->comboBox_layerType->setCurrentIndex(this->ui->comboBox_layerType->findData(this->metatile->layerType));