* sysdep.c: Fix pointer signedness issue.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index b8fbf863074..e19f9ca829e 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -2845,8 +2845,10 @@ system_process_attributes (Lisp_Object pid)
   fd = emacs_open (fn, O_RDONLY, 0);
   if (fd >= 0)
     {
-      for (cmdline_size = 0; emacs_read (fd, &c, 1) == 1; cmdline_size++)
+      char ch;
+      for (cmdline_size = 0; emacs_read (fd, &ch, 1) == 1; cmdline_size++)
         {
+          c = ch;
           if (isspace (c) || c == '\\')
             cmdline_size++;     /* for later quoting, see below */
         }