Reduce the number of warnings in third party code.

third_party/libxml/build/libxml.vcproj

Index: third_party/libxml/build/libxml.vcproj
===================================================================
--- third_party/libxml/build/libxml.vcproj	(revision 7667)
+++ third_party/libxml/build/libxml.vcproj	(working copy)
@@ -12,50 +12,114 @@
 			Name="Win32"
 		/>
 	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
 	<Configurations>
 		<Configuration
 			Name="Debug|Win32"
 			ConfigurationType="4"
-			InheritedPropertySheets="$(SolutionDir)..\build\common.vsprops;$(SolutionDir)..\build\debug.vsprops;$(SolutionDir)..\third_party\libxml\build\using_libxml.vsprops;$(SolutionDir)..\third_party\zlib\using_zlib.vsprops;$(SolutionDir)..\third_party\icu38\build\using_icu.vsprops;$(SolutionDir)..\build\external_code.vsprops"
+			InheritedPropertySheets="$(SolutionDir)..\build\debug.vsprops;.\libxml.vsprops"
 			>
 			<Tool
-				Name="VCLibrarianTool"
+				Name="VCPreBuildEventTool"
 			/>
 			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
 				Name="VCCLCompilerTool"
 			/>
 			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
 				Name="VCLibrarianTool"
 			/>
 			<Tool
-				Name="VCCLCompilerTool"
+				Name="VCALinkTool"
 			/>
 			<Tool
-				Name="VCPreBuildEventTool"
+				Name="VCXDCMakeTool"
 			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
 		</Configuration>
 		<Configuration
 			Name="Release|Win32"
 			ConfigurationType="4"
-			InheritedPropertySheets="$(SolutionDir)..\build\common.vsprops;$(SolutionDir)..\build\release.vsprops;$(SolutionDir)..\third_party\libxml\build\using_libxml.vsprops;$(SolutionDir)..\third_party\zlib\using_zlib.vsprops;$(SolutionDir)..\third_party\icu38\build\using_icu.vsprops;$(SolutionDir)..\build\external_code.vsprops"
+			InheritedPropertySheets="$(SolutionDir)..\build\release.vsprops;.\libxml.vsprops"
 			>
 			<Tool
-				Name="VCLibrarianTool"
+				Name="VCPreBuildEventTool"
 			/>
 			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCWebServiceProxyGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
 				Name="VCCLCompilerTool"
 			/>
 			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
 				Name="VCLibrarianTool"
 			/>
 			<Tool
-				Name="VCCLCompilerTool"
+				Name="VCALinkTool"
 			/>
 			<Tool
-				Name="VCPreBuildEventTool"
+				Name="VCXDCMakeTool"
 			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
 		</Configuration>
 	</Configurations>
+	<References>
+	</References>
 	<Files>
 		<Filter
 			Name="include"
@@ -450,4 +514,6 @@
 			>
 		</File>
 	</Files>
+	<Globals>
+	</Globals>
 </VisualStudioProject>