Fix[fabriclike_install]: ensure array readiness before creating adapter

Author: artdeell

app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabriclikeInstallFragment.java

@@ -239,6 +239,7 @@ private void updateLoaderVersions() {
     }
 
     private void updateLoaderSpinner() {
+        if(mLoaderVersionArray == null) return;
         mLoaderVersionSpinner.setAdapter(createAdapter(mLoaderVersionArray, mOnlyStableCheckbox.isChecked()));
     }
 
@@ -285,6 +286,7 @@ private void updateGameVersions() {
     }
 
     private void updateGameSpinner() {
+        if(mGameVersionArray == null) return;
         mGameVersionSpinner.setAdapter(createAdapter(mGameVersionArray, mOnlyStableCheckbox.isChecked()));
     }