MT#59962 DSMChartReader: follow up for 65b3eed61c

First clear mods vector, then unlock.

Change-Id: Ib1f00ece181f86f2c69ac99e30c55211ff8a6bc7

apps/dsm/DSMChartReader.cpp

@@ -785,7 +785,6 @@ void DSMChartReader::cleanup() {
     if (h_dl)
       dlclose(h_dl);
   }
-  mods_mutex.unlock();
-
   mods.clear();  
+  mods_mutex.unlock();
 }