catch exceptions as const

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I17001575bc409351f5187b1b269e66968d402c1c
diff --git a/src/FruDevice.cpp b/src/FruDevice.cpp
index 52a83ce..1576e30 100644
--- a/src/FruDevice.cpp
+++ b/src/FruDevice.cpp
@@ -1074,7 +1074,7 @@
         fruData = getFRUInfo(static_cast<uint8_t>(bus),
                              static_cast<uint8_t>(address));
     }
-    catch (std::invalid_argument& e)
+    catch (const std::invalid_argument& e)
     {
         std::cerr << "Failure getting FRU Info" << e.what() << "\n";
         return false;