arith: missing alloca.

* arith.c: we need to include "alloca.h" since we have moved
some functions into here from lib.c which use "args.h" macros.
This shows up on Cygwin and some other platforms.

1 files changed, 1 insertions, 0 deletions

diff --git a/arith.c b/arith.c
index c8ec84de..be620755 100644
--- a/arith.c
+++ b/arith.c
@@ -40,6 +40,7 @@
 #if HAVE_ROUNDING_CTL_H
 #include <fenv.h>
 #endif
+#include "alloca.h"
 #include "lib.h"
 #include "signal.h"
 #include "unwind.h"