Remove a wrong closing “extern "C"” in shared/xalloc.c

Signed-off-by: Emmanuel Gil Peyrot <emmanuel.peyrot@collabora.com>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
diff --git a/shared/xalloc.c b/shared/xalloc.c
index 4bf8a3e..9bf5245 100644
--- a/shared/xalloc.c
+++ b/shared/xalloc.c
@@ -47,8 +47,3 @@
 
 	return p;
 }
-
-
-#ifdef  __cplusplus
-}
-#endif