Fix order of deinitialization

src/colvarmodule.cpp

@@ -1305,14 +1305,15 @@ colvarmodule::~colvarmodule()
 
     reset();
 
+    // Clear the global map first, after which each colvar takes down its own CVCs
+    colvar_components_.clear();
+
     // Delete contents of static arrays
     colvarbias::delete_features();
     colvar::delete_features();
     colvar::cvc::delete_features();
     atom_group::delete_features();
 
-    colvar_components_.clear();
-
     // The proxy object will be deallocated last (if at all)
     proxy = nullptr;
   }