Avoid uninitialized memory when decomposing a matrix fails.

Source/platform/transforms/RotateTransformOperation.cpp

Index: Source/platform/transforms/RotateTransformOperation.cpp
diff --git a/Source/platform/transforms/RotateTransformOperation.cpp b/Source/platform/transforms/RotateTransformOperation.cpp
index 8a49884e2d5f333b16a52857229654b5f88df90e..c3e2b9dbaa642ebc1795be3db667ecbb0f1cc90f 100644
--- a/Source/platform/transforms/RotateTransformOperation.cpp
+++ b/Source/platform/transforms/RotateTransformOperation.cpp
@@ -127,7 +127,11 @@ PassRefPtr<TransformOperation> RotateTransformOperation::blend(const TransformOp
 
     // Extract the result as a quaternion
     TransformationMatrix::DecomposedType decomp;
-    toT.decompose(decomp);
+    if (!toT.decompose(decomp)) {
+        // If we can't decompose, bail out of interpolation.
+        const RotateTransformOperation* usedOperation = progress > 0.5 ? this : fromOp;
+        return RotateTransformOperation::create(usedOperation->x(), usedOperation->y(), usedOperation->z(), usedOperation->angle(), Rotate3D);
+    }
 
     // Convert that to Axis/Angle form
     double x = -decomp.quaternionX;