fixed filename slash processing

modules/core/src/trace.cpp

@@ -801,10 +801,12 @@ TraceStorage* TraceManagerThreadLocal::getStorage() const
             const char* pos = strrchr(filepath.c_str(), '/'); // extract filename
 #ifdef _WIN32
             if (!pos)
-                strrchr(filepath.c_str(), '\\');
+                pos = strrchr(filepath.c_str(), '\\');
 #endif
             if (!pos)
                 pos = filepath.c_str();
+            else
+                pos += 1; // fix to skip extra slash in filename beginning
             msg.printf("#thread file: %s\n", pos);
             global->put(msg);
             storage.reset(new AsyncTraceStorage(filepath));