Fix variable in uncompressed JS.

Author: Neil Fraser

javascript/diff_match_patch_uncompressed.js

@@ -536,7 +536,7 @@ diff_match_patch.prototype.diff_charsToLines_ = function(diffs, lineArray) {
  for (var j = 0; j < chars.length; j++) {
  text[j] = lineArray[chars.charCodeAt(j)];
  }
- diffs[j][1] = text.join('');
+ diffs[i][1] = text.join('');
  }
 };