Added check to getPrintSymbol that will return the expression of the Unit if the printSymbol is not set but the expression is.
Added check to getPrintSymbol that will return the expression of the Unit if the printSymbol is not set but the expression is.

git-svn-id: 732371f72e6555f60a7c4b9488c6a4fd1e3cc839@117 4a6684ca-5c49-0410-8270-e1cb95179ea8

sensiasoft/lib-swe-common