minor tweaks

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@6496 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_commands/mod_commands.c

@@ -110,6 +110,11 @@ SWITCH_STANDARD_API(xml_locate_function)
         goto end;
     }
 
+
+	if (stream->event && switch_event_get_header(stream->event, "http-host")) {
+		stream->write_function(stream,  "Content-Type: text/xml\r\n\r\n");
+	}
+
     mydata = strdup(cmd);
     assert(mydata);
 	

src/mod/applications/mod_expr/mod_expr.c

@@ -51,7 +51,13 @@ SWITCH_STANDARD_API(expr_function)
 	int err;
     char val[512] = "", *p;
     char *m_cmd = NULL;
-    size_t len = strlen(cmd) + 3;
+    size_t len;
+
+    if (switch_strlen_zero(cmd)) {
+        goto error;
+    }
+
+    len = strlen(cmd) + 3;
 
 
     m_cmd = malloc(len);