Remove warnings from lexers

Remove warnings (Windows 64 bit compilation) like:
```
warning C4267: '+=': conversion from 'size_t' to 'int', possible loss of data
```
from the different lexers by making use of more consistent data types.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/code.l b/src/code.l
index 6308dff..fbadd27 100644
--- a/src/code.l
+++ b/src/code.l
@@ -101,7 +101,7 @@ struct codeYY_state
   yy_size_t     inputPosition = 0;   //!< read offset during parsing
   int           inputLines = 0;      //!< number of line in the code fragment
   int           yyLineNr = 0;        //!< current line number
-  int           yyColNr = 0;         //!< current column number
+  yy_size_t     yyColNr = 0;         //!< current column number
   bool          needsTermination = FALSE;
 
   bool          exampleBlock = FALSE;