Another memleak in the memtester (need [] with the delete)

src/cpu/memtest/memtest.cc:
    Another memleak in the memtester

--HG--
extra : convert_revision : f7ab079e90d578fb6b9d1ff238d049fcce55b01b

src/cpu/memtest/memtest.cc

@@ -400,7 +400,7 @@ MemTest::tick()
         //This means we assume CPU does write forwarding to reads that alias something
         //in the cpu store buffer.
         if (outstandingAddrs.find(paddr) != outstandingAddrs.end()) {
-            delete result;
+            delete [] result;
             delete req;
             return;
         }