Adds checks for OpenRA.Utility.exe in make.cmd.

It displays a message now instead of file not found error.

make.ps1

@@ -18,6 +18,11 @@ function FindMSBuild
 	return $null
 }
 
+function UtilityNotFound
+{
+	echo "OpenRA.Utility.exe could not be found. Build the project first using the `"all`" command."
+}
+
 if ($args.Length -eq 0)
 {
 	echo "Command list:"
@@ -74,7 +79,7 @@ elseif ($command -eq "clean")
 		rm *.dll
 		rm *.config
 		rm mods/*/*.dll
-		if (Test-Path -Path thirdparty/download/)
+		if (Test-Path thirdparty/download/)
 		{
 			rmdir thirdparty/download -Recurse -Force
 		}
@@ -129,6 +134,8 @@ elseif ($command -eq "dependencies")
 	}
 }
 elseif ($command -eq "test")
+{
+	if (Test-Path OpenRA.Utility.exe)
 	{
 		echo "Testing mods..."
 		echo "Testing Red Alert mod MiniYAML..."
@@ -140,7 +147,14 @@ elseif ($command -eq "test")
 		echo "Testing Tiberian Sun mod MiniYAML..."
 		./OpenRA.Utility.exe ts --check-yaml
 	}
+	else
+	{
+		UtilityNotFound
+	}
+}
 elseif ($command -eq "check")
+{
+	if (Test-Path OpenRA.Utility.exe)
 	{
 		echo "Checking for code style violations in OpenRA.Renderer.Null..."
 		./OpenRA.Utility.exe ra --check-code-style OpenRA.Renderer.Null
@@ -167,13 +181,25 @@ elseif ($command -eq "check")
 		echo "Checking for code style violations in OpenRA.Test..."
 		./OpenRA.Utility.exe cnc --check-code-style OpenRA.Test
 	}
+	else
+	{
+		UtilityNotFound
+	}
+}
 elseif ($command -eq "docs")
+{
+	if (Test-Path OpenRA.Utility.exe)
 	{
 		./make.ps1 version
 		./OpenRA.Utility.exe all --docs | Out-File -Encoding "UTF8" DOCUMENTATION.md
 		./OpenRA.Utility.exe ra --lua-docs | Out-File -Encoding "UTF8" Lua-API.md
 	}
 	else
+	{
+		UtilityNotFound
+	}
+}
+else
 {
 	echo ("Invalid command '{0}'" -f $command)
 }