Fix autoconf check to generate C99 compatible code.
No functional upstream bug tracker so tracked here:
https://bugzilla.redhat.com/show_bug.cgi?id=2159550
diff --git a/configure.ac b/configure.ac
index b336115..bbe39ca 100644
--- a/configure.ac
+++ b/configure.ac
@@ -132,7 +132,7 @@ AC_DEFUN([AC_C_ENDIAN],
[AC_LANG_PROGRAM([], [dnl
long val = 1;
char *c = (char *) &val;
- exit(*c == 1);
+ return (*c == 1);
])
],[
ac_cv_c_endian=big