[PATCH v3] Fix warning in isspace() and isdigit().

[Sebastian Huber]

Hello Aschref,

please use v3 only for the third version of a patch. This is a new 
patch. To avoid confusion please use distinctive subjects. Please fix 
also the coding style in this patch. Since this change is similar to the 
first patch, maybe these two patches should be just one.

You can combine patches in Git with:

git rebase -i

This Git command is a bit more complicated then usual.