build-sys: test functions does not return void

Found using scan-build.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/configure.ac b/configure.ac
index 5a0040301d72478abb7f60db0388a0f3ae79808f..b48a24a5e9ab85ffa2dfa55bc32dccc5c6e80f3d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -491,7 +491,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 
 AC_MSG_CHECKING([whether __progname is defined])
 AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char *__progname;],
-          [if (*__progname == 0) return;])],
+          [if (*__progname == 0) return 1;])],
           AC_DEFINE([HAVE___PROGNAME], [1], [Define if __progname is defined])
           AC_MSG_RESULT([yes]),
           AC_MSG_RESULT([no]))