Fix use of non-standard "uint" type

Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: I476608976c52df97677a64af94767d3945dd9475
diff --git a/src/backends/backendsCommon/test/MemoryManagerTests.cpp b/src/backends/backendsCommon/test/MemoryManagerTests.cpp
index 662a5c2..d70c464 100644
--- a/src/backends/backendsCommon/test/MemoryManagerTests.cpp
+++ b/src/backends/backendsCommon/test/MemoryManagerTests.cpp
@@ -66,7 +66,7 @@
     std::vector<size_t> offsets(numTensors);
     std::iota(std::begin(offsets), std::end(offsets), 0);
 
-    for (uint idx = 0; idx < tensorMemoryPointerVector.size(); ++idx)
+    for (uint32_t idx = 0; idx < tensorMemoryPointerVector.size(); ++idx)
     {
         tensorMemoryVector.emplace_back(std::make_shared<TensorMemory>(TensorMemory{offsets[idx], 0, nullptr}));
 
@@ -93,7 +93,7 @@
     memoryManager.Allocate();
     CHECK(customAllocator->m_CounterAllocate == bufferVecSize);
 
-    uint idx = 0;
+    uint32_t idx = 0;
     for (auto tensorMemory : tensorMemoryVector)
     {
         auto value = reinterpret_cast<uint8_t *>(tensorMemory->m_Data);