First step in the Vim 7.3 branch.  Changed version numbers.
diff --git a/src/vim.def b/src/vim.def
index 577569b..3be4e67 100644
--- a/src/vim.def
+++ b/src/vim.def
@@ -1,4 +1,4 @@
 CODE PRELOAD EXECUTEONLY
 DATA MULTIPLE SHARED
-DESCRIPTION 'Vim 7.2'
+DESCRIPTION 'Vim 7.3a'
 HEAPSIZE 0,0