Minor fix

Thanks to @henrikjacobsenfys

Author: tsdev

swfiles/sw_neutron.m

@@ -145,7 +145,7 @@
         zBM = repmat(n',[1 nHkl]);
 
         if norm(zBM(:,1)'*xBM)/nHkl > 1e-5
-            warning('sw_neutron:ScatteringPlaneProblem','The normal to the scattering plane is not perpendiculat to Q!');
+            warning('sw_neutron:ScatteringPlaneProblem','The normal to the scattering plane is not perpendicular to Q!');
         end
 
         yBM = cross(zBM,xBM);