Fix relinking of unnamed classes (issue #45)

With gcc5 + castxml + std=c++11 some code was not
parseable by pygccxml (see previous commit).

This fixes the problem, but is probably not the
final solution, but as the other cases in the relink
method, a better understanding of this code part
should hopefully help find a better strategy to
handle these cases.

Author: iMichka

pygccxml/parser/project_reader.py

@@ -521,6 +521,9 @@ def _relink_declarated_types(self, leaved_classes, declarated_types):
                 else:
 
                     name = decl_wrapper_type.declaration._name
+                    if name == "":
+                        # Happens with gcc5, castxml + std=c++11 (see issue #45)
+                        continue
                     if name.startswith("__vmi_class_type_info_pseudo"):
                         continue
                     if name == "rebind<std::__tree_node" + \