use Vec::indexOfPtr

Base/Types/OwningVector.h

@@ -19,6 +19,7 @@
 #define BORNAGAIN_BASE_TYPES_OWNINGVECTOR_H
 
 #include "Base/Util/Assert.h"
+#include "Base/Util/Vec.h"
 #include <algorithm>
 #include <cstddef>
 #include <utility>
@@ -59,13 +60,7 @@ public:
     T* const& at(int i) const { return m_v.at(i); }
     T* const& front() const { return m_v.front(); }
     T* const& back() const { return m_v.back(); }
-    int index_of(const T* t) const
-    {
-        for (size_t i = 0; i < m_v.size(); i++)
-            if (m_v[i] == t)
-                return int(i);
-        return -1;
-    }
+    int index_of(const T* t) const { return Vec::indexOfPtr(t, m_v); }
 
     void delete_element(T* e)
     {