Win32: move main macro to a function

diff --git a/RelNotes b/RelNotes
index bb52cf9476df53ddb9788f16082e2e92e76a4db5..7b78eb9715d5ba10b65deee6bb565d93ed3cc365 120000 (symlink)
--- a/RelNotes
+++ b/RelNotes
@@ -1 +1 @@
-Documentation/RelNotes/1.9.0.txt
\ No newline at end of file
+Documentation/RelNotes/1.9.3.txt
\ No newline at end of file