putenv should return success on deletion of nonexistent variable.
fixes one "msvcrt environ" test

Modified: trunk/reactos/lib/crt/misc/environ.c

--- trunk/reactos/lib/crt/misc/environ.c	2005-12-18 00:43:58 UTC (rev 20238)
+++ trunk/reactos/lib/crt/misc/environ.c	2005-12-18 01:29:18 UTC (rev 20239)
@@ -259,7 +259,7 @@

       if (!found)
       {
          free(name);

-         return -1;

+         return 0;

       }
 
       /* Remove the option from wide character environment. */