[hackers] [sent] make usable screensize config const || Markus Teich

[git]

commit 67ec8b1547b9e58155f0966731820b25e71240e8
Author:     Markus Teich <markus.te...@stusta.mhn.de>
AuthorDate: Wed Nov 11 18:41:51 2015 +0100
Commit:     Markus Teich <markus.te...@stusta.mhn.de>
CommitDate: Wed Nov 11 18:41:51 2015 +0100

    make usable screensize config const

diff --git a/config.def.h b/config.def.h
index 27f0c66..11221ee 100644
--- a/config.def.h
+++ b/config.def.h
@@ -12,8 +12,8 @@ static const char *fgcol = "#000000";
 static const char *bgcol = "#FFFFFF";
 
 /* how much screen estate is to be used at max for the content */
-static float usablewidth = 0.75;
-static float usableheight = 0.75;
+static const float usablewidth = 0.75;
+static const float usableheight = 0.75;
 
 static Mousekey mshortcuts[] = {
        /* button         function        argument */