explicit type cast

libevm/VM.h

@@ -206,9 +206,7 @@ template <class Ext> dev::bytesConstRef dev::eth::VM::go(Ext& _ext, OnOpFunc con
 		{
 			unsigned n = (unsigned)inst - (unsigned)Instruction::LOG0;
 			require(n + 2);
-			runGas = m_stack[m_stack.size() - 2];
-			runGas *= c_logDataGas;
-			runGas += c_logGas + c_logTopicGas * n;
+			runGas = c_logGas + c_logTopicGas * n + (bigint)c_logDataGas * m_stack[m_stack.size() - 2];
 			newTempSize = memNeed(m_stack[m_stack.size() - 1], m_stack[m_stack.size() - 2]);
 			break;
 		}
@@ -216,8 +214,7 @@ template <class Ext> dev::bytesConstRef dev::eth::VM::go(Ext& _ext, OnOpFunc con
 		case Instruction::CALL:
 		case Instruction::CALLCODE:
 			require(7);
-			runGas = m_stack[m_stack.size() - 1];
-			runGas += c_callGas;
+			runGas = (bigint)c_callGas + m_stack[m_stack.size() - 1];
 			newTempSize = std::max(memNeed(m_stack[m_stack.size() - 6], m_stack[m_stack.size() - 7]), memNeed(m_stack[m_stack.size() - 4], m_stack[m_stack.size() - 5]));
 			break;