Fixing Visual Studio compilation - these FeeStructure constants are weird

libevm/FeeStructure.cpp

@@ -31,6 +31,12 @@ namespace dev
 namespace eth
 {
 
+#ifndef _MSC_VER
+uint32_t const FeeStructure::c_memoryGas;
+uint32_t const FeeStructure::c_txDataGas;
+uint32_t const FeeStructure::c_txGas;
+#endif
+
 uint32_t FeeStructure::getInstructionFee(Instruction _inst)
 {
 	switch (_inst)

libevm/VM.cpp

@@ -25,10 +25,6 @@ using namespace std;
 using namespace dev;
 using namespace dev::eth;
 
-uint32_t const dev::eth::FeeStructure::c_memoryGas;
-uint32_t const dev::eth::FeeStructure::c_txDataGas;
-uint32_t const dev::eth::FeeStructure::c_txGas;
-
 void VM::reset(u256 _gas)
 {
 	m_gas = _gas;