SWDEV-310181 - Fix for memcpy3D test failure (#2455)

tests/catch/unit/memory/hipMemcpy3D.cc

@@ -272,6 +272,7 @@ void Memcpy3D<T>::NegativeTests() {
   AllocateMemory();
 
   // Initialization of data
+  memset(&myparms, 0, sizeof(myparms));
   myparms.srcPos = make_hipPos(0, 0, 0);
   myparms.dstPos = make_hipPos(0, 0, 0);
   myparms.extent = make_hipExtent(width , height, depth);

tests/catch/unit/memory/hipMemcpy3DAsync.cc

@@ -290,6 +290,7 @@ void Memcpy3DAsync<T>::NegativeTests() {
   HIP_CHECK(hipStreamCreate(&stream));
 
   // Initialization of data
+  memset(&myparms, 0, sizeof(myparms));
   myparms.srcPos = make_hipPos(0, 0, 0);
   myparms.dstPos = make_hipPos(0, 0, 0);
   myparms.extent = make_hipExtent(width , height, depth);