[hackers] [farbfeld] Fix 2 little things in jpg2ff(1) || FRIGN

[git]

commit 4d567caa917deab542225fd548a2673dea42461c
Author:     FRIGN <d...@frign.de>
AuthorDate: Fri Mar 4 12:29:29 2016 +0100
Commit:     FRIGN <d...@frign.de>
CommitDate: Fri Mar 4 12:30:49 2016 +0100

    Fix 2 little things in jpg2ff(1)
    
      - actually print usage when one argument is given
        (forgot to incorporate the argv0-change there).
      - use fputs instead of fprintf for printing a string
        constant.

diff --git a/jpg2ff.c b/jpg2ff.c
index 3140908..dc5b060 100644
--- a/jpg2ff.c
+++ b/jpg2ff.c
@@ -31,7 +31,7 @@ main(int argc, char *argv[])
 
        argv0 = argv[0], argc--, argv++;
 
-       if (argc > 1) {
+       if (argc) {
                fprintf(stderr, "usage: %s\n", argv0);
                return 1;
        }
@@ -65,7 +65,7 @@ main(int argc, char *argv[])
        }
 
        /* write header */
-       fprintf(stdout, "farbfeld");
+       fputs("farbfeld", stdout);
        tmp32 = htonl(width);
        if (fwrite(&tmp32, sizeof(uint32_t), 1, stdout) != 1)
                goto writerr;