Merge PR #2148: Change delegation amount from int64 to sdk.Int

* Change delegation amount from int64 to sdk.Int

* Refactor code according to code review

* leave freeFermionVal to int64 in case of overflow

cmd/gaia/app/genesis.go

@@ -26,7 +26,7 @@ const DefaultKeyPass = "12345678"
 var (
 	// bonded tokens given to genesis validators/accounts
 	freeFermionVal  = int64(100)
-	freeFermionsAcc = int64(50)
+	freeFermionsAcc = sdk.NewInt(50)
 )
 
 // State to Unmarshal
@@ -183,11 +183,11 @@ func GaiaAppGenState(cdc *wire.Codec, appGenTxs []json.RawMessage) (genesisState
 		accAuth := auth.NewBaseAccountWithAddress(genTx.Address)
 		accAuth.Coins = sdk.Coins{
 			{genTx.Name + "Token", sdk.NewInt(1000)},
-			{"steak", sdk.NewInt(freeFermionsAcc)},
+			{"steak", freeFermionsAcc},
 		}
 		acc := NewGenesisAccount(&accAuth)
 		genaccs[i] = acc
-		stakeData.Pool.LooseTokens = stakeData.Pool.LooseTokens.Add(sdk.NewDec(freeFermionsAcc)) // increase the supply
+		stakeData.Pool.LooseTokens = stakeData.Pool.LooseTokens.Add(sdk.NewDecFromInt(freeFermionsAcc)) // increase the supply
 
 		// add the validator
 		if len(genTx.Name) > 0 {
@@ -199,7 +199,7 @@ func GaiaAppGenState(cdc *wire.Codec, appGenTxs []json.RawMessage) (genesisState
 
 			// add some new shares to the validator
 			var issuedDelShares sdk.Dec
-			validator, stakeData.Pool, issuedDelShares = validator.AddTokensFromDel(stakeData.Pool, freeFermionVal)
+			validator, stakeData.Pool, issuedDelShares = validator.AddTokensFromDel(stakeData.Pool, sdk.NewInt(freeFermionVal))
 			stakeData.Validators = append(stakeData.Validators, validator)
 
 			// create the self-delegation from the issuedDelShares