driver now enforces correct order of use of INIT_ACCELERANT and CLONE_ACCELERANT: bailing out with B_NOT_ALLOWED if incorrect use is detected.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16021 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/graphics/nvidia/DriverInterface.h

@@ -5,7 +5,7 @@
 	Other authors:
 	Mark Watson;
 	Apsed;
-	Rudolf Cornelissen 10/2002-01/2006.
+	Rudolf Cornelissen 10/2002-1/2006.
 */
 
 #ifndef DRIVERINTERFACE_H
@@ -136,6 +136,9 @@ typedef struct {
 	uint8	device;		/* PCI device number on bus, from pci_info */
 	uint8	function;	/* PCI function number in device, from pci_info */
 
+  /* used to return status for INIT_ACCELERANT and CLONE_ACCELERANT */
+	bool	accelerant_in_use;
+
   /* bug workaround for 4.5.0 */
 	uint32 use_clone_bugfix;	/*for 4.5.0, cloning of physical memory does not work*/
 	uint32 * clone_bugfix_regs;