Fixing small Kokkos bug

git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@13500 f3b2605a-c512-4ea7-a41b-209d697bcdaa

src/KOKKOS/improper_harmonic_kokkos.h

@@ -11,7 +11,7 @@
    See the README file in the top-level LAMMPS directory.
 ------------------------------------------------------------------------- */
 
-#ifdef DIHEDRAL_CLASS
+#ifdef IMPROPER_CLASS
 
 ImproperStyle(harmonic/kk,ImproperHarmonicKokkos<LMPDeviceType>)
 ImproperStyle(harmonic/kk/device,ImproperHarmonicKokkos<LMPDeviceType>)