Merge pull request #419 from mendsley/ovr_version_fix

VR: Fix OVR_VERSION macro.

src/ovr.h

@@ -13,7 +13,7 @@
 #	include <OVR_Version.h>
 
 #	define OVR_VERSION_(_a, _b, _c) (_a * 10000 + _b * 100 + _c)
-#	define OVR_VERSION     OVR_VERSION_(OVR_MAJOR_VERSION, OVR_MINOR_VERSION, OVR_BUILD_VERSION)
+#	define OVR_VERSION     OVR_VERSION_(OVR_PRODUCT_VERSION, OVR_MAJOR_VERSION, OVR_MINOR_VERSION)
 #	define OVR_VERSION_042 OVR_VERSION_(0, 4, 2)
 #	define OVR_VERSION_043 OVR_VERSION_(0, 4, 3)
 #	define OVR_VERSION_044 OVR_VERSION_(0, 4, 4)