Switch to ANSI C comments
diff --git a/MagickCore/opencl.c b/MagickCore/opencl.c
index d5530e6..8db1aa1 100644
--- a/MagickCore/opencl.c
+++ b/MagickCore/opencl.c
@@ -2723,8 +2723,8 @@
       name=DestroyString(name);
       return(MagickTrue);
     }
-  start/=1000; // usecs
-  end/=1000;   // usecs
+  start/=1000; /* usecs */
+  end/=1000;   
   elapsed=end-start;
   LockSemaphoreInfo(device->lock);
   i=0;