Raise max Hash to 1TB

And use size_t where appropriate, as suggested on FishCooking.

No functional change.

src/tt.cpp

@@ -30,11 +30,9 @@ TranspositionTable TT; // Our global transposition table
 /// measured in megabytes. Transposition table consists of a power of 2 number
 /// of clusters and each cluster consists of TTClusterSize number of TTEntry.
 
-void TranspositionTable::resize(uint64_t mbSize) {
+void TranspositionTable::resize(size_t mbSize) {
 
-  assert(msb((mbSize * 1024 * 1024) / sizeof(TTCluster)) < 32);
-
-  uint32_t newClusterCount = 1 << msb((mbSize * 1024 * 1024) / sizeof(TTCluster));
+  size_t newClusterCount = size_t(1) << msb((mbSize * 1024 * 1024) / sizeof(TTCluster));
 
   if (newClusterCount == clusterCount)
       return;