French numeric keypad patch

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Hi,

In france, ( and maybe in europe), the decimal point separator is ','
but the numeric keypad decimal point is often maped to '.'. It's then
impossible to enter floating point price in gnucash only using the
numeric keypad. I found this unconfortable.

So, here is a patch who permit to use the french numeric keypad to enter
floating point price. ( this patch is based on gnucash-1.4.5.tgz
downloaded at sourceforge )

I've only modified the function 'PriceMV' in register/pricecell.c

* description of the modification :

  - The function is forced to always consider the char '.' to be a valid
decimal point, except if the thousand separator is '.'.

  - At the end if there is the char '.' in newval, it return a new
string with the '.' replaced by the char decimal_point, except if the
thousand separator is '.'. ( the string newval isn't freed , since it
seem to be done in gnucash-sheet.c::gnucash_sheet_insert_cb. )

* How the patch was created :
  -> diff -U3 pricecell.c pricecell.c_patched > numpad_patch
  -> gzip -9 numpad_patch

* How to use the patch :
  -> cd gnucash-1.4.5/src/register/
  -> cp <<where numpad_patch.gz is>> numpad_patch.gz
  -> gnuzip numpad_patch.gz
  -> patch pricecell.c numpad_patch
this should work i hope...

mail me if there is problems.

thanks.

raf.
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