CDROM_GetMountType func for unsupported systems

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@757

src/dos/cdrom_ioctl.cpp

@@ -517,4 +517,15 @@ int CDROM_GetMountType(char* path)
 	return 2;
 };
 */
-#endif
+#else
+
+// Get Mounttype function for unsupported systems
+// always return 0 - physical cdrom
+
+int CDROM_GetMountType(char* path)
+// Always return 0;
+{
+	return 0;
+};
+
+#endif