some platforms don't support strnlen_s

Author: alexanderoster

Source/buildbindingccpp.go

@@ -411,7 +411,9 @@ func buildDynamicCLoadTableCode(component ComponentDefinition, w LanguageWriter,
 
 	w.Writeln("#ifdef _WIN32")
 	w.Writeln("// Convert filename to UTF16-string")
-	w.Writeln("int nLength = static_cast<int>(strnlen_s(pLibraryFileName, MAX_PATH));")
+	w.Writeln("int nLength = 0;")
+	w.Writeln("while ((pLibraryFileName[nLength] != 0) && (nLength < MAX_PATH))")
+	w.Writeln("  nLength++;")
 	w.Writeln("int nBufferSize = nLength * 2 + 2;")
 	if (!useStrictC) {
 		w.Writeln("std::vector<wchar_t> wsLibraryFileName(nBufferSize);")