Reparameterizing an inline C model fails

[tsole0]

**Partner issue of SasView/sasview#2958
** To see how to replicate issue in the SasView GUI, see above issue

Describe the bug
Reparameterizing a python model with inline C code will fail with an error in the format:

11:29:37 - root - ERROR - C:\Users\userDir\AppData\Local\miniconda3\envs\sasview_dev\Lib\site-packages\tinycc\tcc.exe -shared -rdynamic -Wall C:\Users\userDir\AppData\Local\Temp\1\sas64_reparameterizedModel_EF781090_2i9v5xc5.c -o C:\Users\userDir\.sasview\compiled_models\sas64_reparameterizedModel_EF781090.so
C:/Users/userDir/.sasview/plugin_models/oldModel.py:35: error: 'reparameterizedVariable' undeclared

on the developer version of SasView, where reparameterizedModel is the reparameterized file, oldModel is the model being reparameterized, and reparameterizedVariable is the name of a reparameterized variable accessed in inline C code within oldModel.

This bug occurs if any inline C code is included in the model, even if a separate C file is defined using source = [] in the main python file. However, models that have defined C code entirely in a separate file are unaffected.

Note: currently, this bug only affects lamellar.py in the 1.0.7 sasmodels version, but will also affect any user-created models with inline C unless resolved

To Reproduce
Steps to reproduce the behavior:

1. Create a new user model.
2. Copy in the following code:

from numpy import inf

from sasmodels.core import reparameterize
from sasmodels.special import *

parameters = [
    # name, units, default, [min, max], type, description
	['new', '', 0, [-inf, inf], '', ''],
]

translation = """
    sld = new
"""

model_info = reparameterize('lamellar', parameters, translation, __file__)

3. The new model should return an error if a model check is run on it

Expected behavior
The model should have no issues being loaded or used with the new redefinitions.

sasmodels version:

• Version: 1.0.7

Suggested Solution:
Either deprecate using inline C code (only one model currently uses it and it is easily replaceable), or fix the reparameterization code in sasmodels.core to support inline C code.

[pkienzle]

generate._gen_fn needs to be called on the original parameter table, not the new parameter table defined by core.reparameterize. Replacing call_table with base_table in the following should work.

sasmodels/sasmodels/generate.py

Lines 979 to 996 in ab4e49a

	if isinstance(model_info.form_volume, str):
	pars = call_table.form_volume_parameters
	source.append(_gen_fn(model_info, 'form_volume', pars))
	if isinstance(model_info.shell_volume, str):
	pars = call_table.form_volume_parameters
	source.append(_gen_fn(model_info, 'shell_volume', pars))
	if isinstance(model_info.Iq, str):
	pars = [q] + call_table.iq_parameters
	source.append(_gen_fn(model_info, 'Iq', pars))
	if isinstance(model_info.Iqxy, str):
	pars = [qx, qy] + call_table.iq_parameters + call_table.orientation_parameters
	source.append(_gen_fn(model_info, 'Iqxy', pars))
	if isinstance(model_info.Iqac, str):
	pars = [qab, qc] + call_table.iq_parameters
	source.append(_gen_fn(model_info, 'Iqac', pars))
	if isinstance(model_info.Iqabc, str):
	pars = [qa, qb, qc] + call_table.iq_parameters
	source.append(_gen_fn(model_info, 'Iqabc', pars))