Fix iOS/tvOS build.
diff --git a/MoltenVK/MoltenVK/Commands/MVKCommandEncodingPool.mm b/MoltenVK/MoltenVK/Commands/MVKCommandEncodingPool.mm
index 75c8c48..b1a5a26 100644
--- a/MoltenVK/MoltenVK/Commands/MVKCommandEncodingPool.mm
+++ b/MoltenVK/MoltenVK/Commands/MVKCommandEncodingPool.mm
@@ -202,12 +202,14 @@
[_mtlFillBufferComputePipelineState release];
_mtlFillBufferComputePipelineState = nil;
+#if MVK_MACOS
[_mtlClearColorImageComputePipelineState[0] release];
[_mtlClearColorImageComputePipelineState[1] release];
[_mtlClearColorImageComputePipelineState[2] release];
_mtlClearColorImageComputePipelineState[0] = nil;
_mtlClearColorImageComputePipelineState[1] = nil;
_mtlClearColorImageComputePipelineState[2] = nil;
+#endif
[_mtlCopyBufferToImage3DDecompressComputePipelineState[0] release];
[_mtlCopyBufferToImage3DDecompressComputePipelineState[1] release];