updated pkpy to v2.0.4

.gitmodules

@@ -89,3 +89,4 @@
 [submodule "vendor/pocketpy"]
 	path = vendor/pocketpy
 	url = https://github.com/PrimedErwin/pocketpy.git
+	shallow = true

cmake/pocketpy.cmake

@@ -9,6 +9,7 @@ if(BUILD_WITH_PYTHON)
 
     if(NOT WIN32)
         option(PK_BUILD_WITH_IPO "" OFF)
+        option(PK_BUILD_MODULE_LZ4 "" OFF)
     endif()
 
     add_subdirectory(${THIRDPARTY_DIR}/pocketpy)

src/api/python.c

@@ -136,6 +136,7 @@ static bool py_cls(int argc, py_Ref argv)
 
     color = py_toint(py_arg(0));
     core->api.cls(tic, color);
+    py_assign(py_retval(), py_None());
     return true;
 }
 
@@ -172,6 +173,7 @@ static bool py_spr(int argc, py_Ref argv)
         return TypeError("The given argument is not int or list");
 
     core->api.spr(tic, spr_id, x, y, w, h, colors, color_count, scale, flip, rotate);
+    py_assign(py_retval(), py_None());
     return true;
 }