fix issue with static mingw build on Windows

src/CMakeLists.txt

@@ -464,8 +464,13 @@ else()
 endif()
 
 if(TARGET miniupnpc::miniupnpc)
-	target_compile_definitions(SRB2SDL2 PRIVATE -DHAVE_MINIUPNPC)
-	target_link_libraries(SRB2SDL2 PRIVATE miniupnpc::miniupnpc)
+	if("${VCPKG_TARGET_TRIPLET}" MATCHES "-mingw-static$")
+		target_compile_definitions(SRB2SDL2 PRIVATE -DHAVE_MINIUPNPC -DMINIUPNP_STATICLIB)
+		target_link_libraries(SRB2SDL2 PRIVATE miniupnpc::miniupnpc -liphlpapi)
+	else()
+		target_compile_definitions(SRB2SDL2 PRIVATE -DHAVE_MINIUPNPC)
+		target_link_libraries(SRB2SDL2 PRIVATE miniupnpc::miniupnpc)
+	endif()
 	message(STATUS "miniupnpc Found")
 else()
 	message(STATUS "No miniupnpc Found")