Zero initialize enum using rule initializer

Author: lucic71

cpp2rust/converter/converter.cpp

@@ -1789,6 +1789,11 @@ std::string Converter::getIntegerLiteral(clang::IntegerLiteral *expr,
   auto type_as_string = GetUnsafeTypeAsString(ty);
 
   if (ty->isFloatingType() || incl_type) {
+    if (expr->getValue().isZero()) {
+      if (auto init = Mapper::MapInitializer(ty); !init.empty()) {
+        return init;
+      }
+    }
     return std::format("{}_{}", num_as_string.c_str(), type_as_string);
   }