[gnumeric] POWER: Fix regression in error case.

[Morten Welinder <mortenw src gnome org>]

commit 8b154d37613ee6828699944ec9586a0a60f1a7d4
Author: Morten Welinder <terra gnome org>
Date:   Wed Nov 14 10:00:41 2012 -0500

    POWER: Fix regression in error case.

 plugins/fn-math/functions.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/fn-math/functions.c b/plugins/fn-math/functions.c
index ae549bf..5ec7813 100644
--- a/plugins/fn-math/functions.c
+++ b/plugins/fn-math/functions.c
@@ -1246,7 +1246,7 @@ gnumeric_power (GnmFuncEvalInfo *ei, GnmValue const * const *argv)
 		return value_new_float (r);
 	}
 
-	if (x != 0 && y != 0)
+	if (x == 0 && y != 0)
 		return value_new_error_DIV0 (ei->pos);
 	else
 		return value_new_error_NUM (ei->pos);