Python STL container method overloading fix

Fix method overloading of methods that take STL containers of different types.
Due to some error handling that was not cleared during typehecking.

Examples/test-suite/ruby/li_std_containers_overload_runme.rb

@@ -0,0 +1,44 @@
+#!/usr/bin/env ruby
+#
+# Put description here
+#
+# 
+# 
+# 
+#
+
+require 'swig_assert'
+
+require 'li_std_containers_overload'
+
+include Li_std_containers_overload
+
+def check(got, expected)
+  if (got != expected)
+    raise RuntimeError, "Failed check. '#{got}' != '#{expected}'"
+  end
+end
+
+v = VectorX.new()
+check(VectorOverload(v), "vector<X>")
+
+v = VectorY.new()
+check(VectorOverload(v), "vector<Y>")
+
+v = VectorInt.new()
+check(VectorOverload(v), "vector<int>")
+
+v = VectorString.new()
+check(VectorOverload(v), "vector<string>")
+
+v = [X.new()]
+check(VectorOverload(v), "vector<X>")
+
+v = [Y.new()]
+check(VectorOverload(v), "vector<Y>")
+
+v = [1, 2, 3]
+check(VectorOverload(v), "vector<int>")
+
+v = ["aaa", "bbb", "ccc"]
+check(VectorOverload(v), "vector<string>")