Bugfix: fix for -Wno-sign-conversion in profiling test in gcc9

Signed-off-by: Francis Murtagh <francis.murtagh@arm.com>
Change-Id: Ibcbe3c0acfd83dc174cb4bbdffcd72c0c8811b33
diff --git a/src/profiling/test/ProfilingGuidTest.cpp b/src/profiling/test/ProfilingGuidTest.cpp
index 0537bad..2e6b8c0 100644
--- a/src/profiling/test/ProfilingGuidTest.cpp
+++ b/src/profiling/test/ProfilingGuidTest.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright © 2019 Arm Ltd. All rights reserved.
+// Copyright © 2019-2023 Arm Ltd and Contributors. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
 
@@ -128,7 +128,7 @@
 {
     ProfilingGuidGenerator generator;
 
-    for (unsigned int i = 0; i < 100; ++i)
+    for (uint64_t i = 0; i < 100; ++i)
     {
         ProfilingDynamicGuid guid = generator.NextGuid();
         CheckDynamicGuid(guid, i);
@@ -157,7 +157,8 @@
     });
 
     uint64_t guid = profilingGuidGenerator.NextGuid();
-    CHECK(guid == 3000u);
+    uint64_t expected = 3000U;
+    CHECK(guid == expected);
 }
 
 }