Avoid repeated declaration of the same loop variable.

Avoid repeated declaration of the same loop variable.

The following code:

void main() {
  int j = 0;
  for (int i = 0; i < 10; i++) {
    j++;
  }
}

would generate the following:

for (var j = 0, i = 0; i < 10; ) {
  j = j + 1;
  var i = i + 1;
}

with this change the 'var' in the body disappears.


R=ngeoffray@google.com
BUG=
TEST=

Committed: https://code.google.com/p/dart/source/detail?r=8192

[ngeoffray, 2012-06-01 13:12:49]

STV!