fix: Typo in dual.h made invalid template DualStorage (#1871)

Signed-off-by: Larry Gritz <[email protected]>

Author: lgritz

src/include/OSL/dual.h

@@ -204,7 +204,7 @@ class DualStorage<T, 3>
     : m_val(other.m_val)
     , m_dx(other.m_dx)
     , m_dy(other.m_dy)
-    , m_dz(other.dz)
+    , m_dz(other.m_dz)
     {}
 
     OSL_HOSTDEVICE constexpr const T& elem (ConstIndex<0>) const { return m_val; }