KWSys 2021-05-06 (2fa93cfc)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 2fa93cfca6291e8eaffa2a34d2d7908c93e64a6c (master).

Upstream Shortlog
-----------------

Brad King (1):
      5c6539ca Terminal: Revert "Simplify CLICOLOR_FORCE check"

Terminal.c

@@ -167,7 +167,8 @@ static int kwsysTerminalStreamIsVT100(FILE* stream, int default_vt100,
   /* Force color according to http://bixense.com/clicolors/ convention.  */
   {
     const char* clicolor_force = getenv("CLICOLOR_FORCE");
-    if (clicolor_force && strcmp(clicolor_force, "0") != 0) {
+    if (clicolor_force && *clicolor_force &&
+        strcmp(clicolor_force, "0") != 0) {
       return 1;
     }
   }