Fixed so code will compile with SDL_config_minimal.h

src/audio/pulseaudio/SDL_pulseaudio.c

@@ -26,9 +26,10 @@
    was the cleanest way to move it to 1.3. The 1.2 target was written by
    Stéphan Kochen: stephan .a.t. kochen.nl
 */
-
 #include "SDL_config.h"
 
+#if SDL_AUDIO_DRIVER_PULSEAUDIO
+
 /* Allow access to a raw mixing buffer */
 
 #ifdef HAVE_SIGNAL_H
@@ -505,4 +506,6 @@ AudioBootStrap PULSEAUDIO_bootstrap = {
     PULSEAUDIO_DRIVER_NAME, "PulseAudio", PULSEAUDIO_Init, 0
 };
 
+#endif /* SDL_AUDIO_DRIVER_PULSEAUDIO */
+
 /* vi: set ts=4 sw=4 expandtab: */