Fix the .expert command in the shell so that it does not leak memory if not

followed by SQL and so that it works with reverse_unordered_selects.

FossilOrigin-Name: 7ead022edaf7a0cd6a8976a1261246084975c9a5be5c893f6c751bb5f963ac0f

src/shell.c.in

@@ -12772,6 +12772,11 @@ int SQLITE_CDECL wmain(int argc, wchar_t **wargv){
 #ifndef SQLITE_SHELL_FIDDLE
   /* In WASM mode we have to leave the db state in place so that
   ** client code can "push" SQL into it after this call returns. */
+#ifndef SQLITE_OMIT_VIRTUALTABLE
+  if( data.expert.pExpert ){
+    expertFinish(&data, 1, 0);
+  }
+#endif
   free(azCmd);
   set_table_name(&data, 0);
   if( data.db ){