Merge pull request #108 from bfroehle/_cxx_warnings

Fix a couple of C++ warnings.

Cython/Utility/Buffer.c

@@ -107,7 +107,7 @@ typedef struct {
 /////////////// GetAndReleaseBuffer ///////////////
 #if PY_MAJOR_VERSION < 3
 static int __Pyx_GetBuffer(PyObject *obj, Py_buffer *view, int flags) {
-    PyObject *getbuffer_cobj;
+    CYTHON_UNUSED PyObject *getbuffer_cobj;
 
   #if PY_VERSION_HEX >= 0x02060000
     if (PyObject_CheckBuffer(obj)) return PyObject_GetBuffer(obj, view, flags);
@@ -151,7 +151,7 @@ fail:
 
 static void __Pyx_ReleaseBuffer(Py_buffer *view) {
     PyObject *obj = view->obj;
-    PyObject *releasebuffer_cobj;
+    CYTHON_UNUSED PyObject *releasebuffer_cobj;
 
     if (!obj) return;
 

Cython/Utility/Generator.c

@@ -278,7 +278,7 @@ static PyObject *__Pyx_Generator_Send(PyObject *self, PyObject *value) {
             if (value == Py_None)
                 ret = PyIter_Next(yf);
             else
-                ret = PyObject_CallMethod(yf, "send", "O", value);
+                ret = PyObject_CallMethod(yf, (char*)"send", (char*)"O", value);
         }
         gen->is_running = 0;
         //Py_DECREF(yf);
@@ -310,7 +310,7 @@ static int __Pyx_Generator_CloseIter(__pyx_GeneratorObject *gen, PyObject *yf) {
             }
             PyErr_Clear();
         } else {
-            retval = PyObject_CallFunction(meth, "");
+            retval = PyObject_CallFunction(meth, NULL);
             Py_DECREF(meth);
             if (!retval)
                 err = -1;