refactor: PVS-Studio warnings fixes

src/content/Content.hpp

@@ -82,6 +82,10 @@ public:
         return defs.size();
     }
 
+    inline const auto& getIterable() const {
+        return defs;
+    }
+ 
     inline const T* const* getDefs() const {
         return defs.data();
     }

src/content/ContentLUT.hpp

@@ -37,8 +37,8 @@ public:
         for (size_t i = 0; i < count; i++) {
             indices.push_back(i);
         }
-        for (size_t i = 0; i < unitIndices.count(); i++) {
-            names.push_back(unitIndices.get(i)->name); //FIXME: .get(i) potentional null pointer //-V522
+        for (auto unit : unitIndices.getIterable()) {
+            names.push_back(unit->name); 
         }
         for (size_t i = unitIndices.count(); i < count; i++) {
             names.emplace_back("");