Add support for sndio (#878)
45c12e8d18ae4434000ed1521e49d9b5ef91dedf

Index: src/os/unix/pa_unix_hostapis.c
--- src/os/unix/pa_unix_hostapis.c.orig
+++ src/os/unix/pa_unix_hostapis.c
@@ -44,6 +44,7 @@
 
 PaError PaJack_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
 PaError PaAlsa_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
+PaError PaSndio_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
 PaError PaOSS_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
 /* Added for IRIX, Pieter, oct 2, 2003: */
 PaError PaSGI_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
@@ -63,11 +64,19 @@ PaUtilHostApiInitializer *paHostApiInitializers[] =
         PaAlsa_Initialize,
 #endif
 
+#ifdef PA_USE_SNDIO
+        PaSndio_Initialize,
+#endif
+
 #if PA_USE_OSS
         PaOSS_Initialize,
 #endif
 
 #else   /* __linux__ */
+
+#ifdef PA_USE_SNDIO
+        PaSndio_Initialize,
+#endif
 
 #if PA_USE_OSS
         PaOSS_Initialize,
