ChatView: fix memory leak in set_sender_image

Change-Id: Iab61798a32e570ad2e6a2794989d2caccac4b106
Reviewed-by: Stepan Salenikovich <stepan.salenikovich@savoirfairelinux.com>
diff --git a/src/webkitchatcontainer.cpp b/src/webkitchatcontainer.cpp
index a968cd5..fcb8f24 100644
--- a/src/webkitchatcontainer.cpp
+++ b/src/webkitchatcontainer.cpp
@@ -499,7 +499,7 @@
     QString sender_contact_method_str;
     if (sender_contact_method)
     {
-        sender_contact_method_str =  QString(g_strdup_printf("%p", sender_contact_method));
+        sender_contact_method_str =  QString().sprintf("%p", sender_contact_method);
     }
     else
     {