Fixed an error that caused NullPointerException to be raised if a curve had no taper object applied.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10069 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/blender/com/jme3/scene/plugins/blender/curves/CurvesHelper.java

@@ -421,6 +421,9 @@ public class CurvesHelper extends AbstractBlenderHelper {
 	 * @return scale on the pointed place along the curve
 	 */
 	protected float getTaperScale(Spline taper, float percent) {
+		if(taper == null) {
+			return 1;//return scale = 1 if no taper is applied
+		}
 		percent = FastMath.clamp(percent, 0, 1);
 		List<Float> segmentLengths = taper.getSegmentsLength();
 		float percentLength = taper.getTotalLength() * percent;