Wrong source location for deprecation warnings

Given the following module:

-------------------
import Int

main :: IO()
main = print (sizeofInt8 +
              sizeofInt8)
-------------------

ghc-4.11 complains:

/usr/src/packages/BUILD/fptools/hslibs/lang/Int.hi:30:
    Warning: Variable `sizeofInt8' is deprecated:
		 use Storable.sizeOf instead

Main.hs:4: and Main.hs:5: would be the right source locations, because the user wants to know the occurrences in his/her source, not a line number in an interface file. Note that the way deprecation warnings are currently handled one gets a *single* warning, instead of a warning for every occurence of a deprecated entity.

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Trac field	Value
Version	None
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	ResolvedFixed
Component	Compiler
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