Update the file header comments

src/backends/generic/qal.c

@@ -23,8 +23,9 @@
  * Low level, platform depended "qal" API implementation. This files
  * provides functions to load, initialize, shutdown und unload the
  * OpenAL library and connects the "qal" funtion pointers to the
- * OpenAL functions. This source file was taken from Q2Pro and
+ * OpenAL functions. It shopuld work on Windows and unixoid Systems,
- * modified by the YQ2 authors.
+ * other platforms may need an own implementation. This source file
+ * was taken from Q2Pro and modified by the YQ2 authors.
  *
  * =======================================================================
  */

src/backends/generic/qgl.c

@@ -26,6 +26,9 @@
  * QGL_Init() - loads libraries, assigns function pointers, etc.
  * QGL_Shutdown() - unloads libraries, NULLs function pointers
  *
+ * This implementation should work for Windows and unixoid platforms,
+ * other platforms may need an own implementation.
+ *
  * =======================================================================
  */
 

src/backends/generic/vid.c

@@ -29,6 +29,9 @@
  * refresher and those subsystems are the main cause for the very
  * acurate and precise input controls of the id Tech 2.
  *
+ * This implementation works for Windows and unixoid systems, but
+ * other platforms may need an own implementation!
+ *
  * =======================================================================
  */