cmd/compile: fix generic.rules

generic.rules wasn't updated when rewritegeneric.go was. This commit
updates it so that the rewritegeneric.go file can be regenerated.

Fixes #18885.

Change-Id: Ie7dab653ca0a9ea1c255fd12e311a0d9e66afdd2
Reviewed-on: https://go-review.googlesource.com/36032
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

src/cmd/compile/internal/ssa/gen/generic.rules

@@ -1009,11 +1009,11 @@
 	&& mem.Op == OpStaticCall
 	&& isSameSym(mem.Aux, "runtime.newobject")
 	&& c == config.ctxt.FixedFrameSize() + config.RegSize // offset of return value
-	&& warnRule(config.Debug_checknil() && int(v.Pos) > 1, v, "removed nil check")
+	&& warnRule(config.Debug_checknil() && v.Pos.Line() > 1, v, "removed nil check")
 	-> (Invalid)
 (NilCheck (OffPtr (Load (OffPtr [c] (SP)) mem)) mem)
 	&& mem.Op == OpStaticCall
 	&& isSameSym(mem.Aux, "runtime.newobject")
 	&& c == config.ctxt.FixedFrameSize() + config.RegSize // offset of return value
-	&& warnRule(config.Debug_checknil() && int(v.Pos) > 1, v, "removed nil check")
+	&& warnRule(config.Debug_checknil() && v.Pos.Line() > 1, v, "removed nil check")
 	-> (Invalid)