Allow copy_constructers to be called with other types (i.e. var a:string = "hi" calls fun copy_construct(it:char**):void

stdlib/string.krak

@@ -25,6 +25,10 @@ obj string (Object) {
         data.copy_construct(&old->data)
     }
 
+    fun copy_construct(old: char**): void {
+        construct(*old)
+    }
+
     fun destruct():void {
         data.destruct()
     }