- Make counter volatile to prohibit compiler to perform optimisations.

Without this a compiler could assume that the counter is not updated
  my the malloc call and remove the test in the assert and always trigger
  the assertion.

This commit was SVN r12419.

test/memory/opal_memory_basic.c

@@ -27,7 +27,7 @@
 #include "opal/runtime/opal.h"
 #include "opal/memoryhooks/memory.h"
 
-int counter = 0;
+volatile int counter = 0;
 const int bigsize = 100 * 1024 * 1024;
 
 static void