Add checks for String::create with length 0

Author: tobil4sk

test/regression/Issue849/Main.hx

@@ -7,4 +7,15 @@ function main() {
 
 	// char16_t
 	trace(untyped __cpp__('::String::create(u"Hello world")'));
+
+	// explicit 0 length
+
+	// char
+	trace(untyped __cpp__('::String::create("Hello world", 0)'));
+
+	// wchar_t
+	trace(untyped __cpp__('::String::create(L"Hello world", 0)'));
+
+	// char16_t
+	trace(untyped __cpp__('::String::create(u"Hello world", 0)'));
 }

test/regression/Issue849/stdout.txt

@@ -1,3 +1,6 @@
 Main.hx:3: Hello world
 Main.hx:6: Hello world
 Main.hx:9: Hello world
+Main.hx:14: 
+Main.hx:17: 
+Main.hx:20: