C compatibility issue in the configure script

[Florian Weimer]

In standard C, char * amd char ** are different types, and the strtold
call is only valid if the latter is used for its second argument.

We are still considering whether GCC 14 will treat these type safety
violations as errors by default, but it's a possibility.

Thanks,
Florian

diff --git a/configure.ac b/configure.ac
index 6defea0835fe8877..955c1149a8141e19 100644
--- a/configure.ac
+++ b/configure.ac
@@ -885,7 +885,7 @@ AC_CHECK_DECLS([strtold], [
        [AC_COMPILE_IFELSE(
                [AC_LANG_PROGRAM(
                [[#include <stdlib.h>]],
-               [[long double r; char *foo, bar; r = strtold(foo, &bar);]]
+               [[long double r; char *foo, *bar; r = strtold(foo, &bar);]]
        )],
        [bash_cv_strtold_broken=no],[bash_cv_strtold_broken=yes])
         ]