Fix a bit of silliness; the original coding not only computes the required
size of the temp variable incorrectly, but doesn't guarantee the correct
alignment.  This demonstrably leads to ndbd crashing at launch on sparc64,
and is probably bad news for performance on other 64-bit machines even
if they don't give an actual SIGBUS.

Filed upstream at http://bugs.mysql.com/bug.php?id=48132


diff -Naur mysql-5.1.39.orig/storage/ndb/src/kernel/blocks/dbtup/DbtupRoutines.cpp mysql-5.1.39/storage/ndb/src/kernel/blocks/dbtup/DbtupRoutines.cpp
--- mysql-5.1.39.orig/storage/ndb/src/kernel/blocks/dbtup/DbtupRoutines.cpp	2009-09-04 12:21:18.000000000 -0400
+++ mysql-5.1.39/storage/ndb/src/kernel/blocks/dbtup/DbtupRoutines.cpp	2009-10-17 14:24:56.000000000 -0400
@@ -1144,8 +1144,9 @@
                    KeyReqStruct *req_struct,
                    Uint32* outBuffer)
 {
-  Uint32 tmp[sizeof(SignalHeader)+25];
-  Signal * signal = (Signal*)&tmp;
+  SignalT<25> signalT;
+  Signal *signal= (Signal*)&signalT;
+
   switch(attrId){
   case AttributeHeader::FRAGMENT:
     * outBuffer = fragptr.p->fragmentId;
diff -Naur mysql-5.1.39.orig/storage/ndb/src/kernel/blocks/ndbfs/AsyncFile.cpp mysql-5.1.39/storage/ndb/src/kernel/blocks/ndbfs/AsyncFile.cpp
--- mysql-5.1.39.orig/storage/ndb/src/kernel/blocks/ndbfs/AsyncFile.cpp	2009-09-04 12:21:19.000000000 -0400
+++ mysql-5.1.39/storage/ndb/src/kernel/blocks/ndbfs/AsyncFile.cpp	2009-10-17 14:26:21.000000000 -0400
@@ -529,8 +529,8 @@
   {
     off_t off = 0;
     const off_t sz = request->par.open.file_size;
-    Uint32 tmp[sizeof(SignalHeader)+25];
-    Signal * signal = (Signal*)(&tmp[0]);
+    SignalT<25> signalT;
+    Signal *signal= (Signal*)&signalT;
     FsReadWriteReq* req = (FsReadWriteReq*)signal->getDataPtrSend();
 
     Uint32 index = 0;