Fixed crashing when npl was missing.

Author: Martenfur

Nopipeline/Nopipeline.Task/Nopipeline.Task.targets

@@ -5,7 +5,13 @@
 	</ItemGroup>
 
 	<Target Name="Nopipeline">
-		<Exec Command="dotnet &quot;$(MSBuildThisFileDirectory)/../tools/netcoreapp3.1/any/npl.dll&quot; &quot;%(NPLContentReferences.FullPath)&quot;" />
-		<Exec Command="dotnet &quot;$(MSBuildThisFileDirectory)/../tools/netcoreapp3.1/any/npl.dll&quot; &quot;%(MGCBContentReferences.FullPath)&quot;" />
+		<Exec 
+			Command="dotnet &quot;$(MSBuildThisFileDirectory)/../tools/netcoreapp3.1/any/npl.dll&quot; &quot;%(NPLContentReferences.FullPath)&quot;" 
+			Condition="'%(NPLContentReferences.FullPath)' != ''"
+		/>
+		<Exec 
+			Command="dotnet &quot;$(MSBuildThisFileDirectory)/../tools/netcoreapp3.1/any/npl.dll&quot; &quot;%(MGCBContentReferences.FullPath)&quot;" 
+			Condition="'%(MGCBContentReferences.FullPath)' != ''"
+		/>
 	</Target>
 </Project>

Nopipeline/Nopipeline/Program.cs

@@ -16,7 +16,7 @@ public static void Main(string[] args)
 		{
 
 			// Print help information if parameter was not provided.
-			if (args.Length != 1)
+			if (args.Length != 1 || args[0] == "")
 			{
 				PrintHelp();
 				return;

Nuget.props

@@ -1,6 +1,6 @@
 <Project>
 	<PropertyGroup>
-		<Version>2.1.4</Version>
+		<Version>2.1.5</Version>
 		<Description>A Content Pipeline addon for Monogame which fully replaces Pipeline UI.</Description>
 		<Authors>Martenfur</Authors>
 		<Company>Chai Foxes</Company>