chan_vpb: Fix 'catching polymorphic type ... by value' error

Fixes the following compile error:

    chan_vpb.cc:2688:26: error: catching polymorphic type
        ‘class std::exception’ by value

Change-Id: Ic87bc357d72427d77626735c83200fd278a7a649

diff --git a/channels/chan_vpb.cc b/channels/chan_vpb.cc
index e8cd961013b58825fb8ada796ab4548dd92e496d..fe99d5df0b7f914aea66d87f5980181200e03d63 100644 (file)
--- a/channels/chan_vpb.cc
+++ b/channels/chan_vpb.cc
@@ -2691,7 +2691,7 @@ static enum ast_module_load_result load_module()
        ast_format_cap_append(vpb_tech_indicate.capabilities, ast_format_slin, 0);
        try {
                num_cards = vpb_get_num_cards();
-       } catch (std::exception e) {
+       } catch (std::exception&) {
                ast_log(LOG_ERROR, "No Voicetronix cards detected\n");
                return AST_MODULE_LOAD_DECLINE;
        }