Mobile grid skin warnings while making a release build

[Justin Mclean]

Hi,

May or may not be a concern but just in case no one has noticed and it's 
important.

 [asdoc] 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/experimental_mobile/src/spark/skins/MobileGridSkin.as(44):
 col: 19 Warning: The constant was not initialized.
    [asdoc] 
    [asdoc]     private const headerShadowCls320:Class;
    [asdoc]                   ^
    [asdoc] 
    [asdoc] 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/experimental_mobile/src/spark/skins/MobileGridSkin.as(47):
 col: 19 Warning: The constant was not initialized.
    [asdoc] 
    [asdoc]     private const headerShadowCls160:Class;
    [asdoc]                   ^
    [asdoc] 
    [asdoc] 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/experimental_mobile/src/spark/components/supportClasses/MobileGridHeader.as(51):
 col: 19 Warning: The constant was not initialized.
    [asdoc] 
    [asdoc]     private const ascIcon320Cls:Class;
    [asdoc]                   ^
    [asdoc] 
    [asdoc] 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/experimental_mobile/src/spark/components/supportClasses/MobileGridHeader.as(54):
 col: 19 Warning: The constant was not initialized.
    [asdoc] 
    [asdoc]     private const descIcon320Cls:Class;
    [asdoc]                   ^
    [asdoc] 
    [asdoc] 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/experimental_mobile/src/spark/components/supportClasses/MobileGridHeader.as(57):
 col: 19 Warning: The constant was not initialized.
    [asdoc] 
    [asdoc]     private const ascIcon160Cls:Class;
    [asdoc]                   ^
    [asdoc] 
    [asdoc] 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/experimental_mobile/src/spark/components/supportClasses/MobileGridHeader.as(60):
 col: 19 Warning: The constant was not initialized.
    [asdoc] 
    [asdoc]     private const descIcon160Cls:Class;
    [asdoc]                   ^
    [asdoc] 
      [zip] Updating zip: 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/locale/en_US/experimental_mobile_rb.swc
     [copy] Copying 1 file to 
/Users/justinmclean/Documents/ApacheFlex4.12.0/frameworks/projects/experimental_mobile/bundles/en_US