fix

hxd/fs/Convert.hx

@@ -78,10 +78,12 @@ class ConvertFBX2HMD extends Convert {
 	override function convert() {
 		var fbx = try hxd.fmt.fbx.Parser.parse(srcBytes) catch( e : Dynamic ) throw Std.string(e) + " in " + srcPath;
 		var hmdout = new hxd.fmt.fbx.HMDOut(srcPath);
-		if( params.normals )
-			hmdout.generateNormals = true;
-		if( params.precise )
-			hmdout.highPrecision = true;		
+		if( params != null ) {
+			if( params.normals )
+				hmdout.generateNormals = true;
+			if( params.precise )
+				hmdout.highPrecision = true;
+		}
 		hmdout.load(fbx);
 		var isAnim = StringTools.startsWith(originalFilename, "Anim_") || originalFilename.toLowerCase().indexOf("_anim_") > 0;
 		var hmd = hmdout.toHMD(null, !isAnim);