[MLIR][NFC] Fix a memset in MemRefUtils.h

[xgupta]

Summary

found by PVS-Studio - https://pvs-studio.com/en/blog/posts/cpp/1003/, N10.
memset function expects to take int as the second actual argument,
but receives a pointer. Here, the first and the second argument of
the function are mixed up.

mlir/include/mlir/ExecutionEngine/MemRefUtils.h

if (freeFunc)
       freeFunc(descriptor);
   }
   OwningMemRef(const OwningMemRef &) = delete;
   OwningMemRef &operator=(const OwningMemRef &) = delete;
   OwningMemRef &operator=(const OwningMemRef &&other) {
     freeFunc = other.freeFunc;
     descriptor = other.descriptor;
     other.freeFunc = nullptr;
-    memset(0, &other.descriptor, sizeof(other.descriptor));
+    memset(&other.descriptor, 0, sizeof(other.descriptor));
   }
   OwningMemRef(OwningMemRef &&other) { *this = std::move(other); }
 
   DescriptorType &operator*() { return descriptor; }
   DescriptorType *operator->() { return &descriptor; }
   T &operator[](std::initializer_list<int64_t> indices) {
     return descriptor[indices];
   }