wimlib_set_image_property(): forbid NULL or empty property names

diff --git a/src/xml.c b/src/xml.c
index f7d694d..dbce8da 100644 (file)
--- a/src/xml.c
+++ b/src/xml.c
@@ -1425,6 +1425,9 @@ wimlib_set_image_property(WIMStruct *wim, int image, const tchar *property_name,
        const xmlChar *name;
        int ret;
 
+       if (!property_name || !*property_name)
+               return WIMLIB_ERR_INVALID_PARAM;
+
        ret = tstr_get_utf8(property_name, &name);
        if (ret)
                return ret;