(Fset_process_inherit_coding_system_flag): Fix test for non-nil FLAG.

diff --git a/src/process.c b/src/process.c
index 623ab6b..09ca47a 100644 (file)
--- a/src/process.c
+++ b/src/process.c
@@ -868,7 +868,7 @@ for the process which will run.")
      register Lisp_Object process, flag;
 {
   CHECK_PROCESS (process, 0);
-  XPROCESS (process)->inherit_coding_system_flag = !Fnull (flag);
+  XPROCESS (process)->inherit_coding_system_flag = !NILP (flag);
   return flag;
 }