add new flacdiff util
diff --git a/FLAC.sln b/FLAC.sln
index 681281e..1d7f881 100644
--- a/FLAC.sln
+++ b/FLAC.sln
@@ -15,6 +15,11 @@
 EndProject

 Project("{4cefbc7c-c215-11db-8314-0800200c9a66}") = "flac_ren", "src\monkeys_audio_utilities\flac_ren\flac_ren.vcproj", "{4cefbc7f-c215-11db-8314-0800200c9a66}"

 EndProject

+Project("{4cefbc7c-c215-11db-8314-0800200c9a66}") = "flacdiff", "src\utils\flacdiff\flacdiff.vcproj", "{4cefbc93-c215-11db-8314-0800200c9a66}"

+	ProjectSection(ProjectDependencies) = postProject

+		{4cefbc86-c215-11db-8314-0800200c9a66} = {4cefbc86-c215-11db-8314-0800200c9a66}

+	EndProjectSection

+EndProject

 Project("{4cefbc7c-c215-11db-8314-0800200c9a66}") = "getopt_static", "src\share\getopt\getopt_static.vcproj", "{4cefbc80-c215-11db-8314-0800200c9a66}"

 EndProject

 Project("{4cefbc7c-c215-11db-8314-0800200c9a66}") = "grabbag_static", "src\share\grabbag\grabbag_static.vcproj", "{4cefbc81-c215-11db-8314-0800200c9a66}"

@@ -196,6 +201,10 @@
 		{4cefbc92-c215-11db-8314-0800200c9a66}.Debug|Win32.Build.0 = Debug|Win32

 		{4cefbc92-c215-11db-8314-0800200c9a66}.Release|Win32.ActiveCfg = Release|Win32

 		{4cefbc92-c215-11db-8314-0800200c9a66}.Release|Win32.Build.0 = Release|Win32

+		{4cefbc93-c215-11db-8314-0800200c9a66}.Debug|Win32.ActiveCfg = Debug|Win32

+		{4cefbc93-c215-11db-8314-0800200c9a66}.Debug|Win32.Build.0 = Debug|Win32

+		{4cefbc93-c215-11db-8314-0800200c9a66}.Release|Win32.ActiveCfg = Release|Win32

+		{4cefbc93-c215-11db-8314-0800200c9a66}.Release|Win32.Build.0 = Release|Win32

 	EndGlobalSection

 	GlobalSection(SolutionProperties) = preSolution

 		HideSolutionNode = FALSE