gc.dg/warn-1.c failure

[Joern Rennecke]

This test fails because the functions are no longer compiled
at -O3.  If you remove the 'static' from the function declaration
you get the warning back.
Now, should we 'fix' the compiler to always do enough compilation
to emit warnings about conversions due to argument passing?
Or should we change the testcase so that the compiler has to compile
the functions?
 
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