remove some GNUisms. by Dan Fandrich (dan AT coneharvesters.com)

function                                             old     new   delta
logdirs_reopen                                      1310    1308      -2
read_line_input                                     4757    4753      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-6)               Total: -6 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/runit/svlogd.c b/runit/svlogd.c
index 25c169a..66a13fb 100644
--- a/runit/svlogd.c
+++ b/runit/svlogd.c
@@ -670,7 +670,7 @@
 				memRchr = memchr;
 				/* Add '\n'-terminated line to ld->inst */
 				while (1) {
-					int l = asprintf(&new, "%s%s\n", ld->inst ? : "", s);
+					int l = asprintf(&new, "%s%s\n", ld->inst ? ld->inst : "", s);
 					if (l >= 0 && new)
 						break;
 					pause_nomem();