Improved ".selecttrace" output.

FossilOrigin-Name: c0b61f7092a7fd2c5f51db26ce7a7a5c75c227fe
diff --git a/src/expr.c b/src/expr.c
index a175937..c8e8e78 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -1069,9 +1069,7 @@
   pNew->addrOpenEphm[1] = -1;
   pNew->nSelectRow = p->nSelectRow;
   pNew->pWith = withDup(db, p->pWith);
-#if SELECTTRACE_ENABLED
-  memcpy(pNew->zSelLabel, p->zSelLabel, sizeof(p->zSelLabel));
-#endif
+  sqlite3SelectSetName(pNew, p->zSelName);
   return pNew;
 }
 #else