Only access the scissorState's rect when it is valid

It is odd asan/valgrind hasn't been complaining about this

Change-Id: I8e7952e6fc554450ff8c5c5940500f09be48d6b0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255144
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/ops/GrFillRRectOp.cpp b/src/gpu/ops/GrFillRRectOp.cpp
index 13e596b..0760808 100644
--- a/src/gpu/ops/GrFillRRectOp.cpp
+++ b/src/gpu/ops/GrFillRRectOp.cpp
@@ -746,8 +746,13 @@
     initArgs.fDstProxyView = flushState->drawOpArgs().dstProxyView();
     initArgs.fOutputSwizzle = flushState->drawOpArgs().outputSwizzle();
     auto clip = flushState->detachAppliedClip();
-    GrPipeline::FixedDynamicState* fixedDynamicState =
-        flushState->allocator()->make<GrPipeline::FixedDynamicState>(clip.scissorState().rect());
+    GrPipeline::FixedDynamicState* fixedDynamicState = nullptr;
+
+    if (clip.scissorState().enabled()) {
+        fixedDynamicState = flushState->allocator()->make<GrPipeline::FixedDynamicState>(
+                                                                    clip.scissorState().rect());
+    }
+
     GrPipeline* pipeline = flushState->allocator()->make<GrPipeline>(initArgs,
                                                                      std::move(fProcessors),
                                                                      std::move(clip));