chameleon keeps printing sscanf: Success

If one have an env variable set to empty tring instead of int and chameleon_getenv_get_value_int() is used to retrieve it, it will print "sscanf: Success".

A more precise error message or no error message could help: A possible fix:

static inline int
chameleon_getenv_get_value_int(char * string, int default_value) {
    long int ret;
    char *str = chameleon_getenv(string);
    if (str == NULL) return default_value;
    errno = 0;
    if ( sscanf( str, "%ld", &ret ) != 1 ) {
        if (errno != 0) {
            perror("sscanf");
        }
        else {
            // Or we can even remove this message and consider that empty string means default value with no error message.
            fprintf(stderr, "CHAMELEON ERROR: %s() : Empty env variable %s while int value expected\n", __FUNCTION__, string);
        }
        return default_value;
    }

    return (int)ret;
}

This requires also to add include <errno.h>