svg filter: fix SweepWipePath.perform (found by eslint no-undef)

Change-Id: I98d64618d28a06a04ce4e191be6ed90bc9af07bb
diff --git a/filter/source/svg/presentation_engine.js b/filter/source/svg/presentation_engine.js
index 01c49ef..55b0221 100644
--- a/filter/source/svg/presentation_engine.js
+++ b/filter/source/svg/presentation_engine.js
@@ -9922,14 +9922,14 @@ SweepWipePath.prototype.perform = function( nT ) {
    if(!this.bSingle && !this.bOppositeVertical)
        nT /= 2.0;

    var aBasePath = PinWheelWipePath.calcCenteredClock( nT + 0.25, 1.0 );
    var poly = PinWheelWipePath.calcCenteredClock( nT + 0.25, 1.0 );
    var aTransform;

    if(this.bCenter) {
        aTransform = SVGIdentityMatrix.translate(0.5, 0.0);
        aBasePath.matrixTransform(aTransform);
        poly.matrixTransform(aTransform);
    }
    var res = aBasePath;
    var res = poly;

    if(!this.bSingle) {
        if(this.bOppositeVertical) {