[gdb] Add & in catch in svr4_handle_solib_event

In svr4_handle_solib_event I noticed:
...
	catch (const gdb_exception_error)
...

This seems to be the only place were we do this, elsewhere we have:
...
	catch (const gdb_exception_error &)
...

I suppose the intent of adding '&' is to avoid a copy.  I'm not sure if it's
necessary given that it's an unnamed const parameter, but I suppose it can't
hurt either.

Add the '&' here as well.

Tested on x86_64-linux.

Approved-By: Tom Tromey <tom@tromey.com>

diff --git a/gdb/solib-svr4.c b/gdb/solib-svr4.c
index 1a0e5424806e1f9a5b5221410e4173b10953f6cd..ff5887a221df12381796af95b265eeddef1b9cf3 100644 (file)
--- a/gdb/solib-svr4.c
+++ b/gdb/solib-svr4.c
@@ -1948,7 +1948,7 @@ svr4_handle_solib_event (void)
          {
            link_map_id_val = pa->prob->evaluate_argument (0, frame);
          }
-       catch (const gdb_exception_error)
+       catch (const gdb_exception_error &)
          {
            link_map_id_val = NULL;
          }