Makes CollectDataToIORank::localIndexMap_ have nonzero size when accessing.

While it may not produce memory errors it is semantically wrong to insert
entries with random acces into a vector that has reserved enough memory to
hold the values but still has size 0.

ebos/collecttoiorank.hh

@@ -223,7 +223,7 @@ namespace Ewoms
 
                 localIndexMap_.clear();
                 const size_t gridSize = gridManager.grid().size( 0 );
-                localIndexMap_.reserve( gridSize );
+                localIndexMap_.resize( gridSize, -1 );
 
                 // store the local Cartesian index
                 IndexMapType distributedCartesianIndex;