Allocate one 0-byte in asprintf replacement when len==0

Some S3 code depends on this.

diff --git a/source/lib/replace/snprintf.c b/source/lib/replace/snprintf.c
index 9f8a7657e525b7653b7f6148441c83bc3255f6c5..a174dcffed765670a75e6a25d8e376cca521701d 100644 (file)
--- a/source/lib/replace/snprintf.c
+++ b/source/lib/replace/snprintf.c
@@ -1264,7 +1264,7 @@ static int add_cnk_list_entry(struct pr_chunk_x **list,
        VA_COPY(ap2, ap);
        ret = vsnprintf(NULL, 0, format, ap2);
        va_end(ap2);
        VA_COPY(ap2, ap);
        ret = vsnprintf(NULL, 0, format, ap2);
        va_end(ap2);

-       if (ret <= 0) return ret;
+       if (ret < 0) return ret;

 
        (*ptr) = (char *)malloc(ret+1);
        if (!*ptr) return -1;
 
        (*ptr) = (char *)malloc(ret+1);
        if (!*ptr) return -1;