svlogd: fix bug 521: use line buffering if any filtering is done

function                                             old     new   delta
logdirs_reopen                                      1296    1310     +14
svlogd_main                                         1439    1444      +5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/runit/runit_lib.h b/runit/runit_lib.h
index 28769e5..88d1c9f 100644
--- a/runit/runit_lib.h
+++ b/runit/runit_lib.h
@@ -27,10 +27,8 @@
 
 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
 
-extern unsigned byte_chr(char *s,unsigned n,int c);
-
-#define direntry struct dirent
-
+//extern unsigned byte_chr(char *s,unsigned n,int c);
+//
 //struct tai {
 //	uint64_t x;
 //};