[PATCH 2 of 4] Bundle python dll in win32 installer if present

[Pascal Quantin]

# HG changeset patch
# User Pascal Quantin <pascal.quantin at gmail.com>
# Date 1232914116 -3600
# Node ID 1017a13f4a648fb09cf2a78c239fc50f06dca062
# Parent  266e96b02cd529879877db234d2280c0596a8837
Bundle python dll in win32 installer if present

In case hg.exe is generated with the py2exe '-b 2' option instead of '-b 1', python2?.dll is not included in library.zip file and must also be packaged.
The file will be integrated in the installer only if it is present in the dist directory.
Generating hg.exe with the '-b 2' option is mandatory to avoid a crash when pyreadline is installed.

diff --git a/contrib/win32/mercurial.iss b/contrib/win32/mercurial.iss
--- a/contrib/win32/mercurial.iss
+++ b/contrib/win32/mercurial.iss
@@ -36,6 +36,7 @@
 Source: contrib\win32\mercurial.ini; DestDir: {app}; DestName: Mercurial.ini; Check: CheckFile; AfterInstall: ConcatenateFiles;
 Source: contrib\win32\postinstall.txt; DestDir: {app}; DestName: ReleaseNotes.txt
 Source: dist\hg.exe; DestDir: {app}; AfterInstall: Touch('{app}\hg.exe.local')
+Source: dist\python*.dll; Destdir: {app}; Flags: skipifsourcedoesntexist
 Source: dist\library.zip; DestDir: {app}
 Source: dist\mfc71.dll; DestDir: {app}
 Source: dist\msvcr71.dll; DestDir: {app}