Include stdio.h when checking for vsnprintf support

diff --git a/configure.ac b/configure.ac
index 5ebf71d08f7fa86bd35d6c09a523145149171a22..965c8d039b5245b584e8097322d5098ff94172ad 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -205,6 +205,7 @@ AC_CACHE_CHECK([for C99 vsnprintf],ccache_cv_HAVE_C99_VSNPRINTF,[
 AC_TRY_RUN([
 #include <sys/types.h>
 #include <stdarg.h>
+#include <stdio.h>
 void foo(const char *format, ...) {
     va_list ap;
     int len;