Finish bootloader by adding jump to user code

stk500v2/main.cpp

@@ -586,8 +586,6 @@ int main()
 		}
 
 		if (timeout == 0) {
-			timeout = TIMEOUT;
-
 			if (chipEraseFlag == ChipEraseState::PERFORM) {
 				performChipErase();
 				chipEraseFlag = ChipEraseState::NONE;
@@ -595,6 +593,10 @@ int main()
 				performChipErase(finishEraseAddress);
 				chipEraseFlag = ChipEraseState::NONE;
 			}
+
+			typedef void (*jump_fn)() __attribute__((naked, noreturn));
+			constexpr jump_fn boot = 0x0000;
+			boot();
 		}
 	}