build-sys: test functions does not return void
Found using scan-build. Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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@ -491,7 +491,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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AC_MSG_CHECKING([whether __progname is defined])
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AC_LINK_IFELSE([AC_LANG_PROGRAM([extern char *__progname;],
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[if (*__progname == 0) return;])],
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[if (*__progname == 0) return 1;])],
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AC_DEFINE([HAVE___PROGNAME], [1], [Define if __progname is defined])
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AC_MSG_RESULT([yes]),
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AC_MSG_RESULT([no]))
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