cverode: Switch to C++

Switch gstcverode to C++ for consistency with other OpenCV elements, and
support of the new 2.4.11 API.

https://bugzilla.gnome.org/show_bug.cgi?id=754148

ext/opencv/Makefile.am

@@ -5,9 +5,9 @@ libgstopencv_la_SOURCES = gstopencv.cpp \
 			gstopencvvideofilter.c \
 			gstopencvutils.c \
 			gstcvdilate.cpp \
-			gstcvdilateerode.c \
+			gstcvdilateerode.cpp \
 			gstcvequalizehist.c \
-			gstcverode.c \
+			gstcverode.cpp \
 			gstcvlaplace.c \
 			gstcvsmooth.cpp \
 			gstcvsobel.c \

ext/opencv/gstcvdilateerode.cpp

@@ -131,7 +131,8 @@ gst_cv_dilate_erode_class_init (GstCvDilateErodeClass * klass)
   g_object_class_install_property (gobject_class, PROP_ITERATIONS,
       g_param_spec_int ("iterations", "iterations",
           "Number of iterations to run the algorithm", 1, G_MAXINT,
-          DEFAULT_ITERATIONS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+          DEFAULT_ITERATIONS,
+          (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
 
   /* add sink and source pad templates */
   caps = gst_opencv_caps_from_cv_image_type (CV_16UC1);