UNUSED() macro so -Wunused-parameter can be used with GCC without so many warnings.

applied to python api and exotic.c, removed some args being passed down which were not needed.

keyword args for new mathutils types were being ignored when they should raise an error.

source/blender/python/generic/mathutils_matrix.c

@@ -108,7 +108,7 @@ Mathutils_Callback mathutils_matrix_vector_cb = {
 //----------------------------------mathutils.Matrix() -----------------
 //mat is a 1D array of floats - row[0][0],row[0][1], row[1][0], etc.
 //create a new matrix type
-static PyObject *Matrix_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+static PyObject *Matrix_new(PyTypeObject *UNUSED(type), PyObject *args, PyObject *kwds)
 {
 	PyObject *argObject, *m, *s;
 	MatrixObject *mat;
@@ -117,6 +117,11 @@ static PyObject *Matrix_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 		0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f};
 	float scalar;
 
+	if(kwds && PyDict_Size(kwds)) {
+		PyErr_SetString(PyExc_TypeError, "mathutils.Matrix(): takes no keyword args");
+		return NULL;
+	}
+
 	argSize = PyTuple_GET_SIZE(args);
 	if(argSize > MATRIX_MAX_DIM) {	//bad arg nums
 		PyErr_SetString(PyExc_AttributeError, "mathutils.Matrix(): expects 0-4 numeric sequences of the same size\n");
@@ -1142,7 +1147,7 @@ static char Matrix_copy_doc[] =
 "   :return: an instance of itself\n"
 "   :rtype: :class:`Matrix`\n";
 
-PyObject *Matrix_copy(MatrixObject * self)
+PyObject *Matrix_copy(MatrixObject *self)
 {
 	if(!BaseMath_ReadCallback(self))
 		return NULL;
@@ -1680,17 +1685,17 @@ static PyNumberMethods Matrix_NumMethods = {
 		0,				/* nb_index */
 };
 
-static PyObject *Matrix_getRowSize( MatrixObject * self, void *type )
+static PyObject *Matrix_getRowSize(MatrixObject *self, void *UNUSED(closure))
 {
 	return PyLong_FromLong((long) self->rowSize);
 }
 
-static PyObject *Matrix_getColSize( MatrixObject * self, void *type )
+static PyObject *Matrix_getColSize(MatrixObject *self, void *UNUSED(closure))
 {
 	return PyLong_FromLong((long) self->colSize);
 }
 
-static PyObject *Matrix_getMedianScale( MatrixObject * self, void *type )
+static PyObject *Matrix_getMedianScale(MatrixObject *self, void *UNUSED(closure))
 {
 	float mat[3][3];
 
@@ -1710,7 +1715,7 @@ static PyObject *Matrix_getMedianScale( MatrixObject * self, void *type )
 	return PyFloat_FromDouble(mat3_to_scale(mat));
 }
 
-static PyObject *Matrix_getIsNegative( MatrixObject * self, void *type )
+static PyObject *Matrix_getIsNegative(MatrixObject *self, void *UNUSED(closure))
 {
 	if(!BaseMath_ReadCallback(self))
 		return NULL;