Fix windows build for - Add T31 modem support

src/mod/applications/mod_spandsp/mod_spandsp.c

@@ -533,7 +533,9 @@ SWITCH_MODULE_LOAD_FUNCTION(mod_spandsp_init)
 		/* Not such severe to prevent loading */
 	}
 
+#if defined(MODEM_SUPPORT) 
 	modem_global_init(module_interface, pool);
+#endif
 	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "mod_spandsp loaded, using spandsp library version [%s]\n", SPANDSP_RELEASE_DATETIME_STRING);
 
 	return SWITCH_STATUS_SUCCESS;
@@ -545,7 +547,9 @@ SWITCH_MODULE_SHUTDOWN_FUNCTION(mod_spandsp_shutdown)
 
 	mod_spandsp_fax_shutdown();
 	mod_spandsp_dsp_shutdown();
+#if defined(MODEM_SUPPORT) 
 	modem_global_shutdown();
+#endif
 
     if (spandsp_globals.tones) {
         switch_core_hash_destroy(&spandsp_globals.tones);

src/mod/applications/mod_spandsp/mod_spandsp_modem.h

@@ -31,8 +31,8 @@
  *
  */
 
-#include "switch_private.h"
 #if defined(HAVE_OPENPTY) || defined(HAVE_DEV_PTMX) || defined(HAVE_POSIX_OPENPT)
+#include "switch_private.h"
 #define MODEM_SUPPORT 1
 #if !defined(HAVE_POSIX_OPENPT) && !defined(HAVE_DEV_PTMX)
 #define USE_OPENPTY 1