update version numbers (Klaus Niederkrueger)
diff --git a/doxygen/swrast.doxy b/doxygen/swrast.doxy
index 60f49db..830f993 100644
--- a/doxygen/swrast.doxy
+++ b/doxygen/swrast.doxy
@@ -4,7 +4,7 @@
 # General configuration options
 #---------------------------------------------------------------------------
 PROJECT_NAME           = "Mesa swrast"
-PROJECT_NUMBER         = 4.1
+PROJECT_NUMBER         = 5.1
 OUTPUT_DIRECTORY       = 
 OUTPUT_LANGUAGE        = English
 EXTRACT_ALL            = NO