connectedcomponents: use opencv integral types, add to docs, fix up things for a python export

modules/python/src2/cv2.cpp

@@ -123,6 +123,7 @@ typedef Ptr<FeatureDetector> Ptr_FeatureDetector;
 typedef Ptr<DescriptorExtractor> Ptr_DescriptorExtractor;
 typedef Ptr<Feature2D> Ptr_Feature2D;
 typedef Ptr<DescriptorMatcher> Ptr_DescriptorMatcher;
+typedef vector<ConnectedComponentStats> vector_ConnectedComponentStats;
 
 typedef SimpleBlobDetector::Params SimpleBlobDetector_Params;
 
@@ -410,7 +411,7 @@ static bool pyopencv_to(PyObject* obj, bool& value, const char* name = "<unknown
 
 static PyObject* pyopencv_from(size_t value)
 {
-    return PyLong_FromUnsignedLong((unsigned long)value);
+    return PyLong_FromSize_t(value);
 }
 
 static bool pyopencv_to(PyObject* obj, size_t& value, const char* name = "<unknown>")
@@ -497,9 +498,16 @@ static bool pyopencv_to(PyObject* obj, float& value, const char* name = "<unknow
 
 static PyObject* pyopencv_from(int64 value)
 {
-    return PyFloat_FromDouble((double)value);
+    return PyLong_FromLongLong(value);
 }
 
+#if !defined(__LP64__)
+static PyObject* pyopencv_from(uint64 value)
+{
+    return PyLong_FromUnsignedLongLong(value);
+}
+#endif
+
 static PyObject* pyopencv_from(const string& value)
 {
     return PyString_FromString(value.empty() ? "" : value.c_str());