Use addReplyErrorObject with shared.syntaxerror (#8248)

src/db.c

@@ -1208,7 +1208,7 @@ void copyCommand(client *c) {
             selectDb(c,srcid); /* Back to the source DB */
             j++; /* Consume additional arg. */
         } else {
-            addReply(c, shared.syntaxerr);
+            addReplyErrorObject(c,shared.syntaxerr);
             return;
         }
     }

src/geo.c

@@ -620,7 +620,7 @@ void georadiusGeneric(client *c, int srcKeyIndex, int flags) {
                 bybox = 1;
                 i += 3;
             } else {
-                addReply(c, shared.syntaxerr);
+                addReplyErrorObject(c,shared.syntaxerr);
                 return;
             }
         }