Fix for Issue #1962

[ChocoChipset]

Pull request to solve issue #1962.

Floating point numbers with a trailing . character would be rendered as integers.
For example: .032 => will become 32.

The new function peekNextDigitOrPoint takes into account this and is used in the function parseToFloat.

Let me know if any re-factor or modification is required.

[matthijskooijman]

It looks like a correct fix for the issue, thanks. I do have a few remarks:

• The commit message is a bit short. Preferably a commit message has short first line the summarizes what changed (e.g., "Allow a leading decimal separator in Stream::parseFloat"), then an empty line and then more lines with detailed explanations. A reference to the github issue definately belongs in the commit message, but not in the first line. Also, of you write "Fixes Serial.parseFloat doesn't parse leading decimal points #1962", github can automatically close the issue for us.
• You're now duplicating a bunch of code. It might be better to instead add a bool allowPoint argument to peekNextDigit.
• While you're here, it might be good to rename peekNexDigit to something like skipUntilDigit, since the current name really doesn't describe what the function does. This should preferably happen in a separate commit, probably before the main fix.

[ChocoChipset]

Thanks for all the pointers!

I agree on all remarks and will be resubmitting the pull request in brief.

[ChocoChipset]

Ready now, @matthijskooijman! ;]

[matthijskooijman]

Looks good to me!

Now, it's up to the dev team to merge.

[ChocoChipset]

Purrfect!

[Chris--A]

This PR is incomplete.

The changes require Stream.h to be updated also. I have a new PR which fixes this: #3337

[facchinm]

Superseded by #3337