sys/oss4/: Add some spaces in translateable strings.

Original commit message from CVS:
* sys/oss4/oss4-mixer.c:
* sys/oss4/oss4-sink.c:
* sys/oss4/oss4-source.c:
Add some spaces in translateable strings.
Fixes: #555969 #555968 #555965

sys/oss4/oss4-mixer.c

@@ -313,7 +313,7 @@ legacy_oss:
     gst_oss4_mixer_close (mixer);
     if (!silent_errors) {
       GST_ELEMENT_ERROR (mixer, RESOURCE, OPEN_READ_WRITE,
-          (_("Could not open audio device for mixer control handling."
+          (_("Could not open audio device for mixer control handling. "
                   "This version of the Open Sound System is not supported by this "
                   "element.")), ("Try the 'ossmixer' element instead"));
     } else {

sys/oss4/oss4-sink.c

@@ -383,7 +383,7 @@ no_permission:
   {
     if (!silent_errors) {
       GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_WRITE,
-          (_("Could not open audio device for playback."
+          (_("Could not open audio device for playback. "
                   "You don't have permission to open the device.")),
           GST_ERROR_SYSTEM);
     }
@@ -403,7 +403,7 @@ legacy_oss:
   {
     if (!silent_errors) {
       GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_WRITE,
-          (_("Could not open audio device for playback."
+          (_("Could not open audio device for playback. "
                   "This version of the Open Sound System is not supported by this "
                   "element.")), ("Try the 'osssink' element instead"));
     }

sys/oss4/oss4-source.c

@@ -374,7 +374,7 @@ no_permission:
   {
     if (!silent_errors) {
       GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
-          (_("Could not open audio device for playback."
+          (_("Could not open audio device for playback. "
                   "You don't have permission to open the device.")),
           GST_ERROR_SYSTEM);
     }
@@ -395,7 +395,7 @@ legacy_oss:
     gst_oss4_source_close (asrc);
     if (!silent_errors) {
       GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
-          (_("Could not open audio device for playback."
+          (_("Could not open audio device for playback. "
                   "This version of the Open Sound System is not supported by this "
                   "element.")), ("Try the 'osssink' element instead"));
     }