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[ginac.git] / check / test_runner.h

diff --git a/check/test_runner.h b/check/test_runner.h
index e01e5b1540f2e9bee5ae02bd740932e3d9bef550..4a306350f6e0b7de889dcb74275ea9f58fd76b11 100644 (file)
--- a/check/test_runner.h
+++ b/check/test_runner.h
@@ -3,7 +3,7 @@
  *  Utility functions for benchmarking. */
 
 /*
- *  GiNaC Copyright (C) 1999-2016 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2019 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -70,7 +70,7 @@ static int run_expensive_timings_p()
        static const std::string env_name("GINAC_RUN_EXPENSIVE_TIMINGS");
        if (cc++ == 0) {
                char* envvar = std::getenv(env_name.c_str());
-               if (envvar != NULL) {
+               if (envvar != nullptr) {
                        value = std::atoi(envvar);
                        if (value < 0 || value > 2)
                                value = 0;