Fix ext_hook call (#203)

fixes #202

Author: methane

msgpack/unpack.h

@@ -265,9 +265,9 @@ static inline int unpack_callback_ext(unpack_user* u, const char* base, const ch
     }
     // length also includes the typecode, so the actual data is length-1
 #if PY_MAJOR_VERSION == 2
-    py = PyObject_CallFunction(u->ext_hook, "(is#)", typecode, pos, length-1);
+    py = PyObject_CallFunction(u->ext_hook, "(is#)", (int)typecode, pos, (Py_ssize_t)length-1);
 #else
-    py = PyObject_CallFunction(u->ext_hook, "(iy#)", typecode, pos, length-1);
+    py = PyObject_CallFunction(u->ext_hook, "(iy#)", (int)typecode, pos, (Py_ssize_t)length-1);
 #endif
     if (!py)
         return -1;

setup.py

@@ -20,7 +20,7 @@ class NoCython(Exception):
 
 def cythonize(src):
     sys.stderr.write("cythonize: %r\n" % (src,))
-    cython_compiler.compile([src], cplus=True, emit_linenums=True)
+    cython_compiler.compile([src], cplus=True)
 
 def ensure_source(src):
     pyx = os.path.splitext(src)[0] + '.pyx'