loveplus: stub impl of cpusbxpkm.dll (printer) (#319)

## Link to GitHub Issue, if one exists
n/a

## Description of change
Add a stub for `cpusbxpkm.dll`. The stub doesn't work, it's only enough
to allow the game to load; but that is irrelevant since spice hooks the
printer at runtime.

## Testing
Observed the game boot, and was able to print out the test image from
test menu. Will do more testing on a real server.

src/spice2x/stubs/cpusbxpkm.cpp

@@ -0,0 +1,88 @@
+#include <cstdint>
+
+#define EXPORT __declspec(dllexport)
+
+enum {
+    Error_NoError = 0,
+    Error_DeviceNotFound = 100,
+    Error_Busy,
+    Error_Printing_Busy,
+    Error_Printing_Ready,
+    Error_PortBusy,
+    Error_GetCPDIDinfo,
+    Error_PrinterBusy,
+    Error_FuncParamError = 201,
+    Error_MemAllocError,
+    Error_Timeout,
+};
+
+extern "C" int32_t EXPORT __stdcall CPU9CheckPaperRemain(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9CheckPrinter(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9CheckPrintEnd(uint32_t p1, void *p2, void *p3) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9GetFWInfo(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9GetMediaType(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9GetTempInfo(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9GetTotalPrintCount(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9PreHeat(void *p1) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9PrintJobCancel(void *p1) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9PrintOut(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPU9SetPrintParameter2(void *p1, void *p2) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPUASendImage(void *p1, void *p2, void *p3, void *p4) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPUASendImagePrint(
+    void *p1, void *p2, void *p3, bool p4, void *p5, int32_t p6, void *p7) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPUASendImagePrint2(
+    void *p1, void *p2, void *p3, bool p4, bool p5, void *p6, int32_t p7, void *p8) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPUASetPrintParameter(void *p1, void *p2, bool p3, void *p4, void *p5) {
+    return Error_FuncParamError;
+}
+
+extern "C" int32_t EXPORT __stdcall CPUXSearchPrinters(void *p1, void *p2, int32_t p3, void *p4) {
+    return Error_FuncParamError;
+}
+
+extern "C" void EXPORT __stdcall CPUXInit() {
+    return;
+}
+

src/spice2x/stubs/cpusbxpkm.def

@@ -0,0 +1,18 @@
+EXPORTS
+    CPU9CheckPaperRemain
+    CPU9CheckPrinter
+    CPU9CheckPrintEnd
+    CPU9GetFWInfo
+    CPU9GetMediaType
+    CPU9GetTempInfo
+    CPU9GetTotalPrintCount
+    CPU9PreHeat
+    CPU9PrintJobCancel
+    CPU9PrintOut
+    CPU9SetPrintParameter2
+    CPUASendImage
+    CPUASendImagePrint
+    CPUASendImagePrint2
+    CPUASetPrintParameter
+    CPUXInit
+    CPUXSearchPrinters