Use SQLITE_UTF8_ZT since that is also PyUnicode underlying represntation

Author: rogerbinns

src/connection.c

@@ -2841,7 +2841,7 @@ set_context_result(sqlite3_context *context, PyObject *obj)
     strdata = PyUnicode_AsUTF8AndSize(obj, &strbytes);
     if (strdata)
     {
-      sqlite3_result_text64(context, strdata, strbytes, SQLITE_TRANSIENT, SQLITE_UTF8);
+      sqlite3_result_text64(context, strdata, strbytes, SQLITE_TRANSIENT, SQLITE_UTF8_ZT);
       return 1;
     }
     sqlite3_result_error(context, "Unicode conversions failed", -1);

src/cursor.c

@@ -666,7 +666,7 @@ APSWCursor_dobinding(APSWCursor *self, int arg, PyObject *obj)
     strdata = PyUnicode_AsUTF8AndSize(obj, &strbytes);
     if (strdata)
     {
-      res = sqlite3_bind_text64(self->statement->vdbestatement, arg, strdata, strbytes, SQLITE_TRANSIENT, SQLITE_UTF8);
+      res = sqlite3_bind_text64(self->statement->vdbestatement, arg, strdata, strbytes, SQLITE_TRANSIENT, SQLITE_UTF8_ZT);
     }
     else
     {