Whitespace fix

src/include/gpxe/linebuf.h

 
 extern char * buffered_line ( struct line_buffer *linebuf );
 extern int line_buffer ( struct line_buffer *linebuf,
-		  const char **data, size_t *len );
+			 const char **data, size_t *len );
 extern void empty_line_buffer ( struct line_buffer *linebuf );
 
 #endif /* _GPXE_LINEBUF_H */