make all catch() arguments const

- I saw this on http://en.cppreference.com/w/cpp/language/try_catch and
  thought it would be a good idea
- also unify used format to better be able to search for exception
  uses in our codebase

1 files changed, 1 insertions, 1 deletions

diff --git a/src/rest.cpp b/src/rest.cpp
index c52dbb3cd2..304e1d747a 100644
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -307,7 +307,7 @@ bool HTTPReq_REST(AcceptedConnection* conn,
                 return uri_prefixes[i].handler(conn, strReq, mapHeaders, fRun);
             }
         }
-    } catch (RestErr& re) {
+    } catch (const RestErr& re) {
         conn->stream() << HTTPReply(re.status, re.message + "\r\n", false, false, "text/plain") << std::flush;
         return false;
     }