fix readability-*:

* readability-const-return-type
* readability-container-data-pointer
* readability-container-size-empty
* readability-delete-null-pointer
* readability-else-after-return
* readability-inconsistent-declaration-parameter-name
* readability-redundant-member-init
* readability-redundant-smartptr-get
* readability-redundant-string-cstr
* readability-use-anyofallof
* readability-static-definition-in-anonymous-namespace
* readability-static-accessed-through-instance
* readability-simplify-boolean-expr

src/Base/BaseClass.h

@@ -196,9 +196,8 @@ T* freecad_dynamic_cast(Base::BaseClass* type)
     if (type && type->isDerivedFrom(T::getClassTypeId())) {
         return static_cast<T*>(type);
     }
-    else {
-        return nullptr;
-    }
+
+    return nullptr;
 }
 
 /**
@@ -212,9 +211,8 @@ const T* freecad_dynamic_cast(const Base::BaseClass* type)
     if (type && type->isDerivedFrom(T::getClassTypeId())) {
         return static_cast<const T*>(type);
     }
-    else {
-        return nullptr;
-    }
+
+    return nullptr;
 }