Fix typo in DecompilerTypeSystem

ICSharpCode.Decompiler/TypeSystem/DecompilerTypeSystem.cs

@@ -65,7 +65,7 @@ namespace ICSharpCode.Decompiler.TypeSystem
 			compilation = new SimpleCompilation(mainAssembly, referencedAssemblies);
 			// Primitive types are necessary to avoid assertions in ILReader.
 			// Fallback to MinimalCorlib to provide the primitive types.
-			if (compilation.FindType(KnownTypeCode.Void).Kind == TypeKind.Unknown || compilation.FindType(KnownTypeCode.Void).Kind == TypeKind.Unknown) {
+			if (compilation.FindType(KnownTypeCode.Void).Kind == TypeKind.Unknown || compilation.FindType(KnownTypeCode.Int32).Kind == TypeKind.Unknown) {
 				referencedAssemblies.Add(MinimalCorlib.Instance);
 				compilation = new SimpleCompilation(mainAssembly, referencedAssemblies);
 			}