[Bug c/7543] no warning for always-false "if (!a & 0x4)" bitwise and on boolean value

[levon at movementarian dot org]

------- Comment #12 from levon at movementarian dot org  2007-01-21 03:15 -------
It's been a cause of bugs time and time again, so yes, it's useful and
important.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=7543