Fix SkJpegCodec::onSkipScanlines when TURBO_HAS_SKIP is not defined

src/codec/SkJpegCodec.h

Index: src/codec/SkJpegCodec.h
diff --git a/src/codec/SkJpegCodec.h b/src/codec/SkJpegCodec.h
index 7eb5100a8fadcfbd811aad5386c13426b56f20cf..f1785900d79854870e987a559b4784dc1d142aa9 100644
--- a/src/codec/SkJpegCodec.h
+++ b/src/codec/SkJpegCodec.h
@@ -8,6 +8,13 @@
 #ifndef SkJpegCodec_DEFINED
 #define SkJpegCodec_DEFINED
 
+// For testing.
+#ifdef SKNX_NO_SIMD
+#undef TURBO_HAS_CROP
+#undef TURBO_HAS_SKIP
+#undef TURBO_HAS_565
+#endif
+
 #include "SkCodec.h"
 #include "SkColorSpace.h"
 #include "SkColorSpaceXform.h"
@@ -141,6 +148,10 @@ private:
     
     sk_sp<SkData>                      fICCData;
 
+#if !defined(TURBO_HAS_SKIP)
+    SkAutoTMalloc<uint8_t>             fSkipStorage;
+#endif
+
     typedef SkCodec INHERITED;
 };