Merge pull request #2947 from gmaxwell/theyre_maturing_faster_these_days

[wallet] Consider generated coins mature at COINBASE_MATURITY+1

src/main.cpp

@@ -1098,7 +1098,7 @@ int CMerkleTx::GetBlocksToMaturity() const
 {
     if (!IsCoinBase())
         return 0;
-    return max(0, (COINBASE_MATURITY+20) - GetDepthInMainChain());
+    return max(0, (COINBASE_MATURITY+1) - GetDepthInMainChain());
 }