Fix warnings.

Fix warnings.

In class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine:
2009-10-13  Ankit Jain  <jankit@novell.com>

	* DirectoryScanner.cs:
	* ExpressionCollection.cs:
	* GroupingCollection.cs:
	* Project.cs:
	* Target.cs: Fix warnings.

In class/Microsoft.Build.Framework/Mono.XBuild.Framework:
2009-10-13  Ankit Jain  <jankit@novell.com>

	* AssemblyLoadInfo.cs: Fix warning.

In class/Microsoft.Build.Tasks/Microsoft.Build.Tasks:
	* ResolveAssemblyReference.cs: Fix warnings.

2009-10-13  Ankit Jain  <jankit@novell.com>

In class/Microsoft.Build.Utilities/Microsoft.Build.Utilities:
2009-10-13  Ankit Jain  <jankit@novell.com>

	* TaskLoggingHelper.cs:
	* ToolTask.cs: Fix warnings.

svn path=/trunk/mcs/; revision=144002