fix: optimization: PVS-Studio warning V832

It's better to use '= default;' syntax instead of empty constructor and destructor body.
Using '= default;' can help the compiler generate more optimal code.

Reported by: PVS-Studio

Signed-off-by: Vyacheslav Ivanov <islavaivanov76@gmail.com>

src/content/Content.cpp

@@ -46,8 +46,7 @@ Content::Content(
     }
 }
 
-Content::~Content() {
-}
+Content::~Content() = default;
 
 const rigging::SkeletonConfig* Content::getSkeleton(const std::string& id) const {
     auto found = skeletons.find(id);

src/content/ContentBuilder.cpp

@@ -2,7 +2,7 @@
 
 #include "../objects/rigging.hpp"
 
-ContentBuilder::~ContentBuilder() {}
+ContentBuilder::~ContentBuilder() = default;
 
 void ContentBuilder::add(std::unique_ptr<ContentPackRuntime> pack) {
     packs[pack->getId()] = std::move(pack);

src/content/ContentPack.cpp

@@ -142,5 +142,4 @@ ContentPackRuntime::ContentPackRuntime(
 {
 }
 
-ContentPackRuntime::~ContentPackRuntime() {
-}
+ContentPackRuntime::~ContentPackRuntime() = default;

src/content/PacksManager.cpp

@@ -5,8 +5,7 @@
 #include <queue>
 #include <sstream>
 
-PacksManager::PacksManager() {
-}
+PacksManager::PacksManager() = default;
 
 void PacksManager::setSources(std::vector<fs::path> sources) {
     this->sources = sources;
@@ -19,7 +18,7 @@ void PacksManager::scan() {
     for (auto& folder : sources) {
         ContentPack::scanFolder(folder, packsList);
         for (auto& pack : packsList) {
-            packs.emplace(pack.id, pack);
+            packs.try_emplace(pack.id, pack);
         }
     }
 }