fix #79, fix the reload remove edge assert bug. 0.9.189.

@@ -207,6 +207,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
+* v1.0, 2014-08-03, fix [#79](https://github.com/winlinvip/simple-rtmp-server/issues/79), fix the reload remove edge assert bug. 0.9.189.
 * v1.0, 2014-08-03, fix [#57](https://github.com/winlinvip/simple-rtmp-server/issues/57), use lock(acquire/release publish) to avoid duplicated publishing. 0.9.188.
 * v1.0, 2014-08-03, fix [#85](https://github.com/winlinvip/simple-rtmp-server/issues/85), fix the segment-dvr sequence header missing. 0.9.187.
 * v1.0, 2014-08-03, fix [#145](https://github.com/winlinvip/simple-rtmp-server/issues/145), refine ffmpeg log, check abitrate for libaacplus. 0.9.186.

@@ -279,7 +279,15 @@ int SrsEdgeIngester::connect_server()
     close_underlayer_socket();
     
     SrsConfDirective* conf = _srs_config->get_vhost_edge_origin(_req->vhost);
-    srs_assert(conf);
+    
+    // @see https://github.com/winlinvip/simple-rtmp-server/issues/79
+    // when origin is error, for instance, server is shutdown,
+    // then user remove the vhost then reload, the conf is empty.
+    if (!conf) {
+        ret = ERROR_EDGE_VHOST_REMOVED;
+        srs_warn("vhost %s removed. ret=%d", _req->vhost.c_str(), ret);
+        return ret;
+    }
     
     // select the origin.
     std::string server = conf->args.at(origin_index % conf->args.size());

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "188"
+#define VERSION_REVISION "189"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"

@@ -180,6 +180,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_KERNEL_FLV_HEADER             3036
 #define ERROR_KERNEL_FLV_STREAM_CLOSED      3037
 #define ERROR_KERNEL_STREAM_INIT            3038
+#define ERROR_EDGE_VHOST_REMOVED            3039
 
 /**
 * whether the error code is an system control error.