deprecation + integer overflow

[cym13]

Hi,

Using recent DMD a deprecation shows for using an int to hold the index in a foreach. So far I've found 3 places:

• src/dlangui/graphics/ftfonts.d L541
• src/dlangui/widgets/editors.d L3447
• src/dlangui/widgets/editors.d L3797

Those could turn into integer overflow if the length is very large so even though it's unlikely I think it's a clear logic bug.