registry: Fix multi-line `#warning` compiler warning

  subprojects/gstreamer/gst/gstregistry.c:1593: unexpected character `"'

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1802>

diff --git a/subprojects/gstreamer/gst/gstregistry.c b/subprojects/gstreamer/gst/gstregistry.c
index a0b5b17..66e996f 100644 (file)
--- a/subprojects/gstreamer/gst/gstregistry.c
+++ b/subprojects/gstreamer/gst/gstregistry.c
@@ -1590,8 +1590,8 @@ priv_gst_get_relocated_libgstreamer (void)
     }
   }
 #else
-#warning "Unsupported platform for retrieving the current location of a\
- shared library. Relocatable builds will not work."
+#warning "Unsupported platform for retrieving the current location of a shared library."
+#warning "Relocatable builds will not work."
   GST_WARNING ("Don't know how to retrieve the location of the shared "
       "library libgstreamer-" GST_API_VERSION);
 #endif