client: Fix signed comparison warning

https://tracker.ceph.com/issues/68552

Signed-off-by: Adam Emerson <[email protected]>

Author: adamemerson

src/client/Client.cc

@@ -10990,7 +10990,7 @@ int64_t Client::_read(Fh *f, int64_t offset, uint64_t size, bufferlist *bl,
     // C_Read_Sync_NonBlocking::finish().
 
     // trim read based on file size?
-    if ((offset >= in->size) || (size == 0)) {
+    if (std::cmp_greater_equal(offset, in->size) || (size == 0)) {
       // read is requested at the EOF or the read len is zero, therefore just
       // release managed pointers and complete the C_Read_Finisher immediately with 0 bytes