restore compatibility with old pulseaudio versions (<= 0.9.10)

--- SDL-1.2.13/src/audio/pulse/SDL_pulseaudio.h~	2009-03-06 19:37:56.000000000 +0200
+++ SDL-1.2.13/src/audio/pulse/SDL_pulseaudio.h	2009-03-06 19:35:20.000000000 +0200
@@ -42,6 +42,23 @@
 	int    mixlen;
 };
 
+#if (PA_API_VERSION < 12)
+/** Return non-zero if the passed state is one of the connected states */
+static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x) {
+    return
+        x == PA_CONTEXT_CONNECTING ||
+        x == PA_CONTEXT_AUTHORIZING ||
+        x == PA_CONTEXT_SETTING_NAME ||
+        x == PA_CONTEXT_READY;
+}
+/** Return non-zero if the passed state is one of the connected states */
+static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x) {
+    return
+        x == PA_STREAM_CREATING ||
+        x == PA_STREAM_READY;
+}
+#endif	/* pulseaudio <= 0.9.10 */
+
 /* Old variable names */
 #define mainloop		(this->hidden->mainloop)
 #define mainloop_api		(this->hidden->mainloop_api)