Fixes bug #106931 in XInclude entities merging. Daniel

* xinclude.c: Fixes bug #106931 in XInclude entities merging.
Daniel
diff --git a/xinclude.c b/xinclude.c
index d91dce0..12c6f2d 100644
--- a/xinclude.c
+++ b/xinclude.c
@@ -1062,6 +1062,9 @@
 	    } else if ((ent->SystemID != NULL) && (prev->SystemID != NULL)) {
 		if (!xmlStrEqual(ent->ExternalID, prev->ExternalID))
 		    goto error;
+	    } else if ((ent->content != NULL) && (prev->content != NULL)) {
+		if (!xmlStrEqual(ent->content, prev->content))
+		    goto error;
 	    } else {
 		goto error;
 	    }