Addressing mode simplifications

LR35902/inc/LR35902.h

@@ -47,7 +47,7 @@ namespace EightBit {
 			void tickMachine() { tick(4); MachineTicked.fire(); }
 
 		protected:
-			int execute() noexcept final;
+			void execute() noexcept final;
 			int step() noexcept final;
 
 			void handleRESET() noexcept final;

LR35902/src/LR35902.cpp

@@ -466,11 +466,12 @@ int EightBit::GameBoy::LR35902::step() noexcept {
 		}
 	}
 	ExecutedInstruction.fire(*this);
+	assert(cycles() > 0);
 	assert(cycles() % 4 == 0);
 	return cycles();
 }
 
-int EightBit::GameBoy::LR35902::execute() noexcept {
+void EightBit::GameBoy::LR35902::execute() noexcept {
 
 	const auto& decoded = getDecodedOpcode(opcode());
 
@@ -485,10 +486,6 @@ int EightBit::GameBoy::LR35902::execute() noexcept {
 		executeOther(x, y, z, p, q);
 	else
 		executeCB(x, y, z, p, q);
-
-	assert(cycles() > 0);
-
-	return cycles();
 }
 
 void EightBit::GameBoy::LR35902::executeCB(const int x, const int y, const int z, int, int) {