[luatex] Misplaced dot and ddot math accents with Cambria

[Khaled Hosny]

The accents are shifted to the left in Cambria, no problem with XITS:

 \input luaotfload.sty
 \font\test={name:Cambria Math:mode=base;script=math} at 10pt
%\font\test={name:XITS Math:mode=base;script=math} at 10pt
 \textfont0=\test
 
 $\Umathaccent "0"0"0307 {\Umathchar "0"0"1D434}$
 $\Umathaccent "0"0"0308 {\Umathchar "0"0"1D434}$
 \bye

-- 
 Khaled Hosny
 Arabic localiser and member of Arabeyes.org team
 Free font developer