Tools: Fix Matlab compatibility for check_volume_levels.m

Matlab requires switch - end, endswitch is not accepted.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

Author: singalsu

tools/check_volume_levels.m

@@ -46,7 +46,7 @@ function check_volume_levels(cmd, fn1, fn2, fn3, do_plot)
 			end
 		otherwise
 			error('Invalid cmd')
-	endswitch
+	end
 
 end