comparison common.cpp @ 228:acafe033b962 refactoring

Port from trunk/ the fix for linux/OS X ABI mismatches

(Use natural alignment for all fields in dbH).

     std::cerr << "expected: " << O2_MAGIC << ", got: " << dbH->magic << std::endl;
     error("database file has incorrect header", dbName);
   }
 
   if(dbH->version != O2_FORMAT_VERSION) {
-    error("database file has incorect version", dbName);
+    error("database file has incorrect version", dbName);
+  }
+
+  if(dbH->headerSize != O2_HEADERSIZE) {
+    error("sizeof(dbTableHeader) unexpected: platform ABI mismatch?", dbName);
   }
 
   CHECKED_MMAP(char *, db, 0, getpagesize());
 
   // Make some handy tables with correct types