Fix guest parser offset on the last line with CRLF line endings

[b4n]

This is related to #4266, and is basically the test part of #4097 that is actually still relevant, only the CRLF got lost in translation.
This is just a test case showing the issue, so we have something to work on.

FWIW, here's the output:

$ ./ctags -o- $(cat Units/parser-php.r/subparser-crlf.b/args.ctags) Units/parser-php.r/subparser-crlf.b/input.php
ctags: memory for mio may be exhausted

If we trick mini-geany to run it, it's worse:

$ git diff
diff --git a/main/mini-geany.c b/main/mini-geany.c
index e02b3c19a..06d2f8be6 100644
--- a/main/mini-geany.c
+++ b/main/mini-geany.c
@@ -370,7 +370,7 @@ extern int main (int argc, char **argv)
         {
             printf("\nParsing %s:\n", argv[i]);
             /* parseRawBuffer() is called repeatadly during Geany execution */
-            parseRawBuffer(argv[i], NULL, 0, getNamedLanguage("C", 0), tagArray);
+            parseRawBuffer(argv[i], NULL, 0, getNamedLanguage("PHP", 0), tagArray);
 
             processCollectedTags(tagArray);
         }
$ ./mini-geany Units/parser-php.r/subparser-crlf.b/input.php
This parser only parses C files - provide them as arguments on the command line or get a hard-coded buffer parsed when no arguments are provided


Parsing Units/parser-php.r/subparser-crlf.b/input.php:
Error: memory for mio may be exhausted
Segmentation fault

But that's only because with it the fatal() call does not call exit(), and thus does not prevent the use of an NULL submio.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.95%. Comparing base (74ff528) to head (cadd213).
Report is 11 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4267   +/-   ##
=======================================
  Coverage   85.95%   85.95%           
=======================================
  Files         246      246           
  Lines       63470    63435   -35     
=======================================
- Hits        54554    54526   -28     
+ Misses       8916     8909    -7     

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[b4n]

@masatake I have a fix that mostly look reasonable, but I'm still not sure I get everything around this, so please review carefully and don't trust the logic :) Results seem solid though.