Fix for pointer math -- ensure that we're interpreting by (char *),

not (unsigned long*).  Thanks to Paul Hargrove for catching this.

This commit was SVN r7685.

opal/mca/paffinity/linux/paffinity_linux_module.c

@@ -149,7 +149,7 @@ static int linux_module_set(int id)
     }
     byte = id / 8;
     bit = id % 8;
-    mask[byte] = 1 << bit;
+    ((char *) mask)[byte] = 1 << bit;
 
     ret = sched_setaffinity(0, len, mask);