Fix typo in ResourceTracker

Fixed the typo which caused "failed to open sysmem connection"
error.

Change-Id: I8aabbcc1b48675d11084d5655160f35318181291
diff --git a/system/vulkan_enc/ResourceTracker.cpp b/system/vulkan_enc/ResourceTracker.cpp
index 17e3dda..cfc165a 100644
--- a/system/vulkan_enc/ResourceTracker.cpp
+++ b/system/vulkan_enc/ResourceTracker.cpp
@@ -605,7 +605,7 @@
             mControlDevice.Bind(std::move(channel));
 
             zx::channel sysmem_channel(GetConnectToServiceFunction()("/svc/fuchsia.sysmem.Allocator"));
-            if (!channel) {
+            if (!sysmem_channel) {
                 ALOGE("failed to open sysmem connection");
             }
             mSysmemAllocator.Bind(std::move(sysmem_channel));