[PATCH 1 of 6] 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 8f999aa6bfe44098dd9097c2d411980713ce6d2b
# Parent  25fc4c620e542f5dd9887c47c08b16bbe2215d61
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}