[jdom-interest] Verifier.checkXMLName() - small performance improvement.

[Rolf Lear]

The following provides a slight, but easy performance gain in this method.

Existing code:
...
for (int i=0, len = name.length(); i<len; i++) {
...


Replace with:
for (int i=1, len = name.length(); i<len; i++) {


Reason:

The first character is already confirmed to be an "isXMLNameStartCharacter",
which is a pure subset of the "isXMLNameCharacter" every other letter is
checked against.

Thus, the first letter of every Element and Attribute name is verified
twice.

Rolf
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