Test for ticket #4, from package cimport module, finish fixing ticket.

Cython/Compiler/Nodes.py

@@ -4687,6 +4687,10 @@ class FromCImportStatNode(StatNode):
                     elif kind == 'class':
                         entry = module_scope.declare_c_class(name, pos = pos,
                             module_name = self.module_name)
+                    else:
+                        submodule_scope = env.context.find_module(name, relative_to = module_scope, pos = self.pos)
+                        if submodule_scope.parent_module is module_scope:
+                            env.declare_module(as_name or name, submodule_scope, self.pos)
                         else:
                             error(pos, "Name '%s' not declared in module '%s'"
                                 % (name, self.module_name))

tests/compile/a/b.pxd

+cdef int **foo(void*)

tests/compile/cimport_package_module_T4.pyx

+from a cimport b
+
+cdef int **t = b.foo(NULL)