[poppler] ABWOutputDev and doubles (good one)

[Albert Astals Cid]

Hi, i've just realized ABWOutputDev is using 
 sprintf(buf, "%f", doublevalue); 

Since in poppler 0.12 we do not force the C locale for LC_NUMERIC anymore this 
writes a , in some locales instead of a .

This is probably a problem for abiword. Dominic, Jauco, can you confirm if it 
is a problem? I know how to fix it, but want to know if it is a problem before 
touching anything :D

Albert