Support for type 'E' multiple response sets in SPSS SAV files

[slobodan-ilic]

Issue

ReadStat currently doesn't properly handle type 'E' multiple response sets in SPSS SAV files. These are dichotomies with CATEGORYLABELS=COUNTEDVALUES and appear in subtype 19 records in addition to the already supported subtype 7.

Reproduction

When trying to parse an SPSS SAV file containing type 'E' multiple response sets, ReadStat fails to properly process them.

Solution

I've implemented a fix that:

1. Adds support for subtype 19 (SAV_RECORD_SUBTYPE_MULTIPLE_RESPONSE_SETS_V14)
2. Modifies the Ragel grammar to handle type 'E' format with its additional parameters
3. Updates the code to set is_dichotomy flag for both types 'D' and 'E'

The changes are minimal and focused on the specific issue:

• Added a constant in
• Modified the Ragel grammar in
• Updated the condition in to handle both subtypes

Testing

I've tested the changes with files containing type 'E' multiple response sets, and they are now correctly parsed.

I can submit a pull request with these changes if desired.