Fix bug in isValidRemoteName
Fix bug in isValidRemoteName

According to the docs git_remote_is_valid_name returns either 1 (success) or 0.

dleehr/objective-git,tiennou/objective-git,dleehr/objective-git,blackpixel/objective-git,tiennou/objective-git,libgit2/objective-git,blackpixel/objective-git,libgit2/objective-git,blackpixel/objective-git,dleehr/objective-git,tiennou/objective-git,blackpixel/objective-git,libgit2/objective-git,dleehr/objective-git,libgit2/objective-git