misc: fix a few memory leaks and invalid memory accesses.

caca/file.c

@@ -1,6 +1,6 @@
 /*
  *  libcaca       Colour ASCII-Art library
- *  Copyright (c) 2006-2010 Sam Hocevar <sam@hocevar.net>
+ *  Copyright (c) 2006-2012 Sam Hocevar <sam@hocevar.net>
  *                All Rights Reserved
  *
  *  This library is free software. It comes without any warranty, to
@@ -118,8 +118,8 @@ caca_file_t *caca_file_open(char const *path, const char *mode)
 
         if(inflateInit2(&fp->stream, -MAX_WBITS))
         {
-            free(fp);
             gzclose(fp->gz);
+            free(fp);
             seterrno(EINVAL);
             return NULL;
         }

src/cacaplay.c

@@ -1,6 +1,6 @@
 /*
  *  cacaplay      caca file player
- *  Copyright (c) 2006-2010 Sam Hocevar <sam@hocevar.net>
+ *  Copyright (c) 2006-2012 Sam Hocevar <sam@hocevar.net>
  *                All Rights Reserved
  *
  *  This program is free software. It comes without any warranty, to
@@ -78,6 +78,7 @@ int main(int argc, char **argv)
             if(n < 0)
             {
                 fprintf(stderr, "%s: read error\n", argv[0]);
+                free(buf);
                 return -1;
             }
             else if(n == 0)
@@ -110,6 +111,7 @@ int main(int argc, char **argv)
     caca_get_event(dp, CACA_EVENT_KEY_PRESS, NULL, -1);
 
     /* Clean up */
+    free(buf);
     close(fd);
 
     caca_free_display(dp);

tools/makefont.c

@@ -1,6 +1,6 @@
 /*
  *  makefont      create libcaca font data
- *  Copyright (c) 2006-2010 Sam Hocevar <sam@hocevar.net>
+ *  Copyright (c) 2006-2012 Sam Hocevar <sam@hocevar.net>
  *                All Rights Reserved
  *
  *  This program is free software. It comes without any warranty, to
@@ -337,6 +337,7 @@ int main(int argc, char *argv[])
     free(glyph_data);
     g_object_unref(l);
     g_object_unref(cx);
+    g_object_unref(fm);
 
     return 0;
 }