Further fixes for the sndio CMake detection

cmake/sdlchecks.cmake

@@ -305,6 +305,7 @@ macro(CheckSNDIO)
       file(GLOB SNDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/sndio/*.c)
       list(APPEND SOURCE_FILES ${SNDIO_SOURCES})
       set(SDL_AUDIO_DRIVER_SNDIO 1)
+      list(APPEND EXTRA_CFLAGS ${PKG_SNDIO_CFLAGS})
       if(SDL_SNDIO_SHARED AND NOT HAVE_SDL_LOADSO)
         message_warn("You must have SDL_LoadObject() support for dynamic sndio loading")
       endif()
@@ -313,7 +314,7 @@ macro(CheckSNDIO)
         set(SDL_AUDIO_DRIVER_SNDIO_DYNAMIC "\"${SNDIO_LIB_SONAME}\"")
         set(HAVE_SNDIO_SHARED TRUE)
       else()
-        list(APPEND EXTRA_LIBS ${D_SNDIO_LIB})
+        list(APPEND EXTRA_LIBS ${PKG_SNDIO_LDFLAGS})
       endif()
       set(HAVE_SDL_AUDIO TRUE)
     endif()