Fix calls to memset() with arguments out of order. (Bug #9323)

bdb/hash/hash_open.c:
  Fix order of arguments to memset()
bdb/btree/bt_open.c:
  Fix order of arguments to memset()
ndb/src/kernel/vm/VMSignal.cpp:
  Fix order of arguments to memset()

bdb/btree/bt_open.c

@@ -489,7 +489,7 @@ __bam_new_file(dbp, txn, fhp, name)
 			goto err;
 	} else {
 #ifdef DIAGNOSTIC
-		memset(buf, dbp->pgsize, 0);
+		memset(buf, 0, dbp->pgsize);
 #endif
 		root = (PAGE *)buf;
 	}

bdb/hash/hash_open.c

@@ -409,7 +409,7 @@ __ham_new_file(dbp, txn, fhp, name)
 			goto err;
 	} else {
 #ifdef DIAGNOSTIC
-		memset(buf, dbp->pgsize, 0);
+		memset(buf, 0, dbp->pgsize);
 #endif
 		page = (PAGE *)buf;
 	}

ndb/src/kernel/vm/VMSignal.cpp

@@ -18,8 +18,8 @@
 #include <string.h>
 
 Signal::Signal(){
-  memset(&header, sizeof(header), 0);
-  memset(theData, sizeof(theData), 0);
+  memset(&header, 0, sizeof(header));
+  memset(theData, 0, sizeof(theData));
 }
 
 void