[Pkg] Installer: Installer-Core-ul.91.mcz

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A new version of Installer-Core was added to project Installer:
http://www.squeaksource.com/Installer/Installer-Core-ul.91.mcz

==================== Summary ====================

Name: Installer-Core-ul.91
Author: ul
Time: 12 December 2009, 2:23:15 am
UUID: 51e9f361-7e14-ba4a-aa96-5cf37ba5820b
Ancestors: Installer-Core-nice.90

- replace sends of #ifNotNilDo: to #ifNotNil:, #ifNil:ifNotNilDo: to #ifNil:ifNotNil:, #ifNotNilDo:ifNil: to #ifNotNil:ifNil:

=============== Diff against Installer-Core-nice.90 ===============

Item was changed:
  ----- Method: Installer>>installMCZ:from: (in category 'mantis') -----
  installMCZ: aFileName from: stream 
  
+ 	self classMczInstaller ifNotNil: [ :reader | ^reader installStream: stream].  
+ 	self classMCMczReader ifNotNil: [ :reader | ^(reader versionFromStream: stream) load]. 
- 	self classMczInstaller ifNotNilDo: [ :reader | ^reader installStream: stream].  
- 	self classMCMczReader ifNotNilDo: [ :reader | ^(reader versionFromStream: stream) load]. 
  
  	self error: 'no monticello readers available'. 
   !