Cleanup: replace C-style casts with functional casts for numeric types

source/blender/functions/tests/FN_multi_function_test.cc

@@ -198,7 +198,7 @@ TEST(multi_function, CustomMF_SI_SI_SI_SO)
 {
   CustomMF_SI_SI_SI_SO<int, std::string, bool, uint> fn{
       "custom",
-      [](int a, const std::string &b, bool c) { return (uint)((uint)a + b.size() + (uint)c); }};
+      [](int a, const std::string &b, bool c) { return uint(uint(a) + b.size() + uint(c)); }};
 
   Array<int> values_a = {5, 7, 3, 8};
   Array<std::string> values_b = {"hello", "world", "another", "test"};