add stub for loading vgz directly

neotools/autoextract.c

@@ -12,6 +12,14 @@ int main(int argc, char** argv)
 	if (!file)
 		return 1;
 
+	if (fgetc(file) == 0x1F && fgetc(file) == 0x8B)
+	{
+		printf("I'm a little gzip short and stout\n");
+		return 2;
+	}
+
+	fseek(file, 0, SEEK_SET);
+
 	int err = vgmExtractSamples(file);
 	fclose(file);
 	return err;