Reworked the function that creates default wrappers so that it never inserts new DefExprs with exprType fields.  Such DefExprs are inserted during parsing and handled during normalization, specifically in fix_def_exprs.  This change is important for work that I am doing in which I'm trying to insert destructor calls for value types during normalization.
Reworked the function that creates default wrappers so that it never
inserts new DefExprs with exprType fields.  Such DefExprs are inserted
during parsing and handled during normalization, specifically in
fix_def_exprs.  This change is important for work that I am doing in
which I'm trying to insert destructor calls for value types during
normalization.


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@15671 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

chizarlicious/chapel,hildeth/chapel,hildeth/chapel,sungeunchoi/chapel,hildeth/chapel,sungeunchoi/chapel,hildeth/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,chizarlicious/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,hildeth/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,chizarlicious/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,hildeth/chapel,CoryMcCartan/chapel