Removed unnecessary Desugar() calls when testing whether or not a type is primitive.

The extension method IsPrimitiveType does the desugaring - see 55bbba46dd.

src/Generator/Generators/CLI/CLIMarshal.cs

@@ -501,7 +501,7 @@ namespace CppSharp.Generators.CLI
             }
 
             PrimitiveType primitive;
-            if (decl.Type.Desugar().IsPrimitiveType(out primitive))
+            if (decl.Type.IsPrimitiveType(out primitive))
             {
                 Context.Return.Write("(::{0})", typedef.Declaration.QualifiedOriginalName);
             }

src/Generator/Generators/CLI/CLISourcesTemplate.cs

@@ -970,7 +970,7 @@ namespace CppSharp.Generators.CLI
             if (Driver.Options.MarshalCharAsManagedChar)
             {
                 foreach (var param in method.Parameters.Where(
-                    p => p.Type.Desugar().IsPrimitiveType(PrimitiveType.Int8)))
+                    p => p.Type.IsPrimitiveType(PrimitiveType.Int8)))
                 {
                     WriteLine("if ({0} < System::Char::MinValue || {0} > System::SByte::MaxValue)", param.Name);
                     WriteLineIndent(

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -2105,7 +2105,7 @@ namespace CppSharp.Generators.CSharp
             if (Driver.Options.MarshalCharAsManagedChar)
             {
                 foreach (var param in method.Parameters.Where(
-                    p => p.Type.Desugar().IsPrimitiveType(PrimitiveType.Int8)))
+                    p => p.Type.IsPrimitiveType(PrimitiveType.Int8)))
                 {
                     WriteLine("if ({0} < char.MinValue || {0} > sbyte.MaxValue)", param.Name);
                     WriteLineIndent(
@@ -2690,7 +2690,7 @@ namespace CppSharp.Generators.CSharp
 
             WriteLineIndent("EntryPoint=\"{0}\")]", function.Mangled);
 
-            if (function.ReturnType.Type.Desugar().IsPrimitiveType(PrimitiveType.Bool))
+            if (function.ReturnType.Type.IsPrimitiveType(PrimitiveType.Bool))
                 WriteLine("[return: MarshalAsAttribute(UnmanagedType.I1)]");
 
             var @params = new List<string>();

src/Generator/Passes/CheckIgnoredDecls.cs

@@ -342,7 +342,7 @@ namespace CppSharp.Passes
             var arrayType = type as ArrayType;
             PrimitiveType primitive;
             if (arrayType != null && arrayType.SizeType == ArrayType.ArraySize.Constant &&
-                !arrayType.Type.Desugar().IsPrimitiveType(out primitive) &&
+                !arrayType.Type.IsPrimitiveType(out primitive) &&
                 !arrayType.Type.Desugar().IsPointerToPrimitiveType())
             {
                 msg = "unsupported";