From 1b87c2be2a9cdf5b0d3cb883da53f391c5db0461 Mon Sep 17 00:00:00 2001
From: Julien Danjou <julien@danjou.info>
Date: Sat, 8 Mar 2008 10:26:19 +0100
Subject: [PATCH] Verify user input for tag values (mwfact, nmaster and ncol)

Signed-off-by: Julien Danjou <julien@danjou.info>
---
 tag.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/tag.c b/tag.c
index c53621fa9..29946bca7 100644
--- a/tag.c
+++ b/tag.c
@@ -39,9 +39,16 @@ tag_new(const char *name, Layout *layout, double mwfact, int nmaster, int ncol)
     tag = p_new(Tag, 1);
     tag->name = a_strdup(name);
     tag->layout = layout;
+
     tag->mwfact = mwfact;
-    tag->nmaster = nmaster;
-    tag->ncol = ncol;
+    if(tag->mwfact <= 0 || tag->mwfact >= 1)
+        tag->mwfact = 0.5;
+
+    if((tag->nmaster = nmaster) < 0)
+        tag->nmaster = 1;
+
+    if((tag->ncol = ncol) < 1)
+        tag->ncol = 1;
 
     return tag;
 }