IDL: Fixed functions that require _this.

scripts/csharp.lua

@@ -272,6 +272,21 @@ function converter.funcs(func)
 	local first = ""
 	local args  = "("
 
+	if func.this ~= nil then
+
+		local thisType = func.this:gsub("const ", "")
+		if thisType == "bgfx_encoder_t*" then
+			thisType = "Encoder*"
+		elseif thisType == "bgfx_attachment_t*" then
+			thisType = "Attachment*"
+		elseif thisType == "bgfx_vertex_decl_t*" then
+			thisType = "VertexDecl*"
+		end
+
+		args = args .. thisType .. " " .. "_this"
+		first = ", "
+	end
+
 	for _, arg in ipairs(func.args) do
 
 		local argtype = convert_type(arg)