Fix type conversion errors in OrdersEA_Smart_Grid

Changed initEquity from int to double to fix:
- Line 217: double - int subtraction
- Line 226: int * double / double calculation
- Added explicit cast for BaseEquity assignment

This resolves implicit type conversion warnings/errors in MT5.

OrdersEA_Smart_Grid.mq5

@@ -102,7 +102,7 @@ bool BelowLow;
 int tradeLogId;
 double closeOnProfit;
 bool bGetOutOK, bOpenNewTradesOK;
-int initEquity;
+double initEquity;
 int lotDigits;
 bool bWithdrawMailSent= false;
 bool bGetOutHandled;
@@ -303,7 +303,7 @@ int OnInit()
    trade.SetDeviationInPoints(10);
    trade.SetTypeFilling(ORDER_FILLING_IOC);
    
-   initEquity = BaseEquity;
+   initEquity = (double)BaseEquity;
    lotDigits = 2;
    
    double tickSize = SymbolInfoDouble(_Symbol, SYMBOL_TRADE_TICK_SIZE);