[hackers] [surf] Fix error handling in spawn() || Quentin Rameau

[git]

commit cdc80731fba6ce33bf6803009bf2b838b3be8192
Author:     Quentin Rameau <quinq@fifth.space>
AuthorDate: Sun Nov 22 13:44:31 2015 +0100
Commit:     Quentin Rameau <quinq@fifth.space>
CommitDate: Sun Nov 22 13:44:31 2015 +0100

    Fix error handling in spawn()
    
    Be more specific about process name and exit with an error.

diff --git a/surf.c b/surf.c
index 842b7ea..32c1920 100644
--- a/surf.c
+++ b/surf.c
@@ -643,9 +643,9 @@ spawn(Client *c, const Arg *a)
                        close(ConnectionNumber(dpy));
                setsid();
                execvp(((char **)a->v)[0], (char **)a->v);
-               fprintf(stderr, "surf: execvp %s", ((char **)a->v)[0]);
+               fprintf(stderr, "%s: execvp %s", argv0, ((char **)a->v)[0]);
                perror(" failed");
-               exit(0);
+               exit(1);
        }
 }