[gnumeric] OpenBSD: work around powerof2 macro in system headers.

[Morten Welinder <mortenw src gnome org>]

commit 0dc2eece10cbd4d4afe69f42ff42ade5cbed3504
Author: Morten Welinder <terra gnome org>
Date:   Mon Jun 27 09:07:13 2011 -0400

    OpenBSD: work around powerof2 macro in system headers.

 src/dialogs/dialog-preferences.c |    6 +++---
 src/sheet.c                      |    6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/src/dialogs/dialog-preferences.c b/src/dialogs/dialog-preferences.c
index 5d047d7..4b40d0e 100644
--- a/src/dialogs/dialog-preferences.c
+++ b/src/dialogs/dialog-preferences.c
@@ -378,7 +378,7 @@ int_pref_create_widget (GOConfNode *node, GtkWidget *table,
 }
 
 static gboolean
-powerof2 (int i)
+powerof_2 (int i)
 {
 	return i > 0 && (i & (i - 1)) == 0;
 }
@@ -388,9 +388,9 @@ cb_power_of_2 (GtkAdjustment *adj)
 {
 	int val = (int)gtk_adjustment_get_value (adj);
 
-	if (powerof2 (val - 1))
+	if (powerof_2 (val - 1))
 		gtk_adjustment_set_value (adj, (val - 1) * 2);
-	else if (powerof2 (val + 1))
+	else if (powerof_2 (val + 1))
 		gtk_adjustment_set_value (adj, (val + 1) / 2);
 }
 
diff --git a/src/sheet.c b/src/sheet.c
index 32ec828..9d786c2 100644
--- a/src/sheet.c
+++ b/src/sheet.c
@@ -1078,7 +1078,7 @@ gnm_sheet_visibility_get_type (void)
 /* ------------------------------------------------------------------------- */
 
 static gboolean
-powerof2 (int i)
+powerof_2 (int i)
 {
 	return i > 0 && (i & (i - 1)) == 0;
 }
@@ -1088,10 +1088,10 @@ gnm_sheet_valid_size (int cols, int rows)
 {
 	return (cols >= GNM_MIN_COLS &&
 		cols <= GNM_MAX_COLS &&
-		powerof2 (cols) &&
+		powerof_2 (cols) &&
 		rows >= GNM_MIN_ROWS &&
 		rows <= GNM_MAX_ROWS &&
-		powerof2 (rows)
+		powerof_2 (rows)
 #if 0
        	&& 0x80000000u / (unsigned)(cols / 2) >= (unsigned)rows
 #endif