Eliminate warnings

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1186 42af7a65-404d-4744-a932-0658087f49c3

lib/lib_fopen.c

@@ -212,7 +212,9 @@ FAR struct file_struct *lib_fdopen(int fd, FAR const char *mode,
         }
     }
 
+#if CONFIG_STDIO_BUFFER_SIZE > 0
 errout_with_sem:
+#endif
   stream_semgive(slist);
 
 errout:

lib/lib_init.c

@@ -168,8 +168,9 @@ void lib_releaselist(FAR struct streamlist *list)
 
        if (crefs <= 0)
           {
+#if CONFIG_STDIO_BUFFER_SIZE > 0
             int i;
-
+#endif
             /* Destroy the semaphore and release the filelist */
 
             (void)sem_destroy(&list->sl_sem);

lib/lib_libfread.c

@@ -260,7 +260,9 @@ ssize_t lib_fread(FAR void *ptr, size_t count, FAR FILE *stream)
             }
         }
 #endif
+#if CONFIG_STDIO_BUFFER_SIZE > 0
     short_read:
+#endif
       bytes_read = dest - (unsigned char*)ptr;
     err_out:
       lib_give_semaphore(stream);