cli: Fix invalid option message.

[apitrace] / cli / cli_diff_state.cpp

diff --git a/cli/cli_diff_state.cpp b/cli/cli_diff_state.cpp
index 341d244ff0d5adc14d9f0e59d6e06056068ed513..a802b12a6bdf18f573d09ca9315c8e396627eeb1 100644 (file)
--- a/cli/cli_diff_state.cpp
+++ b/cli/cli_diff_state.cpp
@@ -66,7 +66,7 @@ command(int argc, char *argv[])
             usage();
             return 0;
         default:
-            std::cerr << "error: unexpected option `" << opt << "`\n";
+            std::cerr << "error: unexpected option `" << (char)opt << "`\n";
             usage();
             return 1;
         }