Vector symbol rotation doesn't rotate against center in Safari

[Lucent]

Rotating a symbol using the rotation symbolizer apparently does not rotate the symbol around its center in Safari. Tested in 4.0.4 up to today's nightly (55519).

 This is a slightly modified version of the OpenLayers rotation example. All stars are plotted along the same y offset with varying rotations, though they shift left and right and even clip in Safari.

[Lucent]

This only appears to happen with some symbols. Star is extremely out of alignment, triangle slightly so, and the others appear on target. My custom symbolizer is also significantly out of alignment.

The demo page now marks the true center the symbol should be rotating around in red, for comparison.

[ahocevar]

The attached patch fixes the issue, as can be seen in the graphic-name.html example. Tests still pass. Please review.

[bartvde]

Please don't close the ticket Lucent, the developer will do that once it gets committed to subversion. You could place a comment stating it works for you.

[bartvde]

Looks good Andreas, please commit.

[ahocevar]

(In [10136]) fixed rotation center for non-square symbols in non-defs mode (Webkit). r=bartvde (closes #2499)