Fix ifdef mismatch for mirroruv

source/row_win.cc

Index: source/row_win.cc
diff --git a/source/row_win.cc b/source/row_win.cc
index 5cb5d1e4f5d9f20f7baa172be1d0fa4faa91af64..f9c477f2ab2af5145bb79617475e84df457f47ae 100644
--- a/source/row_win.cc
+++ b/source/row_win.cc
@@ -3154,7 +3154,7 @@ void MirrorRow_AVX2(const uint8* src, uint8* dst, int width) {
 }
 #endif  // HAS_MIRRORROW_AVX2
 
-#ifdef HAS_MIRRORROW_UV_SSSE3
+#ifdef HAS_MIRRORUVROW_SSSE3
 // Shuffle table for reversing the bytes of UV channels.
 static const uvec8 kShuffleMirrorUV = {
   14u, 12u, 10u, 8u, 6u, 4u, 2u, 0u, 15u, 13u, 11u, 9u, 7u, 5u, 3u, 1u
@@ -3187,7 +3187,7 @@ void MirrorUVRow_SSSE3(const uint8* src, uint8* dst_u, uint8* dst_v,
     ret
   }
 }
-#endif  // HAS_MIRRORROW_UV_SSSE3
+#endif  // HAS_MIRRORUVROW_SSSE3
 
 #ifdef HAS_ARGBMIRRORROW_SSE2
 __declspec(naked)