PATCH to real.c:do_multiply

[Jason Merrill]

I tracked down a recent bootstrap failure to our failure to initialize
u.canonical along with the rest of u.

Repeat after me:  I will always use memset to initialize a struct.  Trying
to initialize all members invariably breaks.

Booted and tested powerpc-linux-gnu, applied to trunk and tree-ssa.

2003-08-27  Jason Merrill  <jason@redhat.com>

	* real.c (do_multiply): Initialize with memset.

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