sfio: squash -Wunused-variable on platforms without SIGPIPE

This warning, for example, is triggered in Mingw builds.

diff --git a/lib/sfio/sfmode.c b/lib/sfio/sfmode.c
index 51bc85383242e2644c3ebc3a0c0cd89a2502e30b..2ded6d3d7560709e93d5170a6f6151baf2e09989 100644 (file)
--- a/lib/sfio/sfmode.c
+++ b/lib/sfio/sfmode.c
@@ -37,7 +37,9 @@
 /* the below is for protecting the application from SIGPIPE */
 #include               <signal.h>
 typedef void (*Sfsignal_f) (int);
+#ifdef SIGPIPE
 static int _Sfsigp = 0;                /* # of streams needing SIGPIPE protection */
+#endif
 
 /* done at exiting time */
 static void _sfcleanup(void)