MT#59962 DSMChartReader: close `h_dl` if import failed

If import of the DSM module fails, close previously
allocated handler for dynamic linking.

Fixes:

    CID 542305: (#1 of 1): Resource leak (RESOURCE_LEAK)
    13. leaked_storage: Variable h_dl going out of scope leaks the storage it points to.

Change-Id: I426188a2d819c320862ad7de64a01e5ad08e3725

apps/dsm/DSMChartReader.cpp

@@ -261,13 +261,14 @@ bool DSMChartReader::importModule(const string& mod_cmd, const string& mod_path)
   SCFactoryCreate fc = NULL;
   if ((fc = (SCFactoryCreate)dlsym(h_dl,SC_FACTORY_EXPORT_STR)) == NULL) {
     ERROR("invalid SC module '%s' (SC_EXPORT missing?)\n", fname.c_str());
+    dlclose(h_dl);
     return false;
   }
    
   DSMModule* mod = (DSMModule*)fc();
   if (!mod) {
-    ERROR("module '%s' did not return functions.\n", 
-	  fname.c_str());
+    ERROR("module '%s' did not return functions.\n",  fname.c_str());
+    dlclose(h_dl);
     return false;
   }