catch exceptions as const

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ic2b49715c7b81ac5bcfc12ff2d3b4c593cd95ce7
diff --git a/ipmid-new.cpp b/ipmid-new.cpp
index be809cf..7f558cd 100644
--- a/ipmid-new.cpp
+++ b/ipmid-new.cpp
@@ -598,7 +598,7 @@
         {
             addr = dlopen(name.c_str(), RTLD_NOW);
         }
-        catch (std::exception& e)
+        catch (const std::exception& e)
         {
             log<level::ERR>("ERROR opening IPMI provider",
                             entry("PROVIDER=%s", name.c_str()),