-Wconversion problem??

[Bill Priest]

All, 
Is -Wconversion supposed to work? 

Platform Linux x86 
gcc 3.0.4 release 
gcc-20020401 snapshot 

wconversion.c 
------------------------ 
void foo(float value); 

void bar(void) 
{ 
foo((float) 10.0); 
} 
------------------------ 

gcc -c -Wconversion wconversion.c 

wconversion.c: In function `bar': 
wconversion.c:5: warning: passing arg 1 of `foo' as `float' rather than
`double' due to prototype 

if the code looks as follows I don't get any warnings 

void foo(double value); 

void bar(void) 
{ 
foo( (float) 10.0); 
} 

Am I missing something here?? 
I looked at comments & code in c-typeck.c 
and didn't see anything suspicious. 

Bill