[vte] app: Unset env var when not in test mode

[Christian Persch <chpe src gnome org>]

commit f608f08f727bf9bc7b45e6e311560fc7f5a59e62
Author: Christian Persch <chpe src gnome org>
Date:   Mon Mar 5 00:08:25 2018 +0100

    app: Unset env var when not in test mode
    
    Just to make sure other processes don't inherit it.

 src/app/app.cc |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/app/app.cc b/src/app/app.cc
index 854ccbe..d424064 100644
--- a/src/app/app.cc
+++ b/src/app/app.cc
@@ -2113,6 +2113,8 @@ main(int argc,
        if (options.test_mode) {
                g_setenv("VTE_TEST", "1", true);
                options.allow_window_ops = true;
+       } else {
+               g_unsetenv("VTE_TEST");
        }
 #endif