Fix another signed / unsigned comparison warning.

test/unit/utFBXImporterExporter.cpp

@@ -235,7 +235,7 @@ TEST_F(utFBXImporterExporter, importEmbeddedAsciiTest) {
     const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/FBX/embedded_ascii/box.FBX", aiProcess_ValidateDataStructure);
     EXPECT_NE(nullptr, scene);
 
-    EXPECT_EQ(1, scene->mNumMaterials);
+    EXPECT_EQ(1u, scene->mNumMaterials);
     aiMaterial *mat = scene->mMaterials[0];
     ASSERT_NE(nullptr, mat);
 

test/unit/utglTF2ImportExport.cpp

@@ -210,7 +210,7 @@ TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesFanWithoutIndices)
     EXPECT_NE(nullptr, scene);
     EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
     EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
-    std::array<int, 3> f1 = {{ 0u, 1u, 2u }};
+    std::array<unsigned int, 3> f1 = {{ 0u, 1u, 2u }};
     EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3u);
     for (size_t i = 0; i < 3; ++i) {
         EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);