rna/py-api fix.

C functions and python used different argument order, this relied on mapping non-keyword arguments to 'REQUIRED' arguments but meant that you could not have an optional, non-keyword argument.

next commit will make order of arguments consistant (currently only changed order that rna wrapped).
(commit 27674 by Campbell from render25 branch)

source/blender/python/intern/bpy_rna.c

@@ -3004,7 +3004,7 @@ static PyObject * pyrna_func_call(PyObject *self, PyObject *args, PyObject *kw)
 		parm_id= RNA_property_identifier(parm);
 		item= NULL;
 
-		if ((i < pyargs_len) && (flag & PROP_REQUIRED)) {
+		if (i < pyargs_len) {
 			item= PyTuple_GET_ITEM(args, i);
 			i++;
 
@@ -3049,14 +3049,6 @@ static PyObject * pyrna_func_call(PyObject *self, PyObject *args, PyObject *kw)
 	
 	RNA_parameter_list_end(&iter);
 
-    /* TODO: arg passing is currently messed up with keyword and args,
-	 * needs reworking however this should stop annoying problems
-     * where args are ignored (for now) */
-    if(i != pyargs_len) {
-		PyErr_Format(PyExc_TypeError, "%.200s.%.200s(): congratulations, you found a bug in blender. argument %d needs to be a keyword argument until its fixed", RNA_struct_identifier(self_ptr->type), RNA_function_identifier(self_func), i+1);
-		err= -1;
-	}
-
 	/* Check if we gave args that dont exist in the function
 	 * printing the error is slow but it should only happen when developing.
 	 * the if below is quick, checking if it passed less keyword args then we gave.