[evince] mdvi-lib: Fix compilation warning (const-correctness)

[Tobias Mueller <tobiasmue src gnome org>]

commit e3dccc1839cca2d55796fbfa33f41c654dbe6586
Author: astian <astian eclipso at>
Date:   Thu Jul 20 02:35:29 2017 +0000

    mdvi-lib: Fix compilation warning (const-correctness)
    
    const char accessed via pointer to char.
    
    backend/dvi/mdvi-lib/fontmap.c: In function ‘mdvi_init_fontmaps’:
    backend/dvi/mdvi-lib/fontmap.c:725:9: warning: assignment discards
    ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
      config = kpse_cnf_get("mdvi-config");
             ^
    
    https://bugzilla.gnome.org/show_bug.cgi?id=784912

 backend/dvi/mdvi-lib/fontmap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/backend/dvi/mdvi-lib/fontmap.c b/backend/dvi/mdvi-lib/fontmap.c
index ec42f2e..89da466 100644
--- a/backend/dvi/mdvi-lib/fontmap.c
+++ b/backend/dvi/mdvi-lib/fontmap.c
@@ -706,7 +706,7 @@ static int  mdvi_init_fontmaps(void)
        FILE    *in;
        Dstring input;
        int     count = 0;
-       char    *config;
+       const char      *config;
 
        if(fontmaps_loaded)
                return 0;