catch exceptions as const

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I17001575bc409351f5187b1b269e66968d402c1c
diff --git a/src/Utils.cpp b/src/Utils.cpp
index e92897e..f859eb6 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -309,7 +309,7 @@
                     {
                         constant = std::stoi(*it);
                     }
-                    catch (std::invalid_argument&)
+                    catch (const std::invalid_argument&)
                     {
                         std::cerr << "Parameter not supported for templates "
                                   << *it << "\n";
@@ -397,9 +397,9 @@
                 keyPair.value() = static_cast<uint64_t>(temp);
             }
         }
-        catch (std::invalid_argument&)
+        catch (const std::invalid_argument&)
         {}
-        catch (std::out_of_range&)
+        catch (const std::out_of_range&)
         {}
     }
     // non-hex numbers
@@ -410,7 +410,7 @@
             uint64_t temp = boost::lexical_cast<uint64_t>(*strPtr);
             keyPair.value() = temp;
         }
-        catch (boost::bad_lexical_cast&)
+        catch (const boost::bad_lexical_cast&)
         {}
     }
     return ret;