EXIF fixes by reald (closes #80)

commit 9c8226a1a54d1246e086923bb1b36e3827b25767
Merge: e4483e5 132ecc0
Author: Dennis Real <github@tildepipe.org>
Date:   Sun Feb 5 17:24:17 2012 +0100

    Merge branch 'master' of ssh://github.com/reald/feh

commit e4483e5e25a1471728a31a18d22ba86def489509
Author: Dennis Real <github@tildepipe.org>
Date:   Sun Feb 5 16:56:29 2012 +0100

    - improved handling of images which have exif tags but not ours
    - fixed uninitialized pointer in thumbnail mode
    - added nikon lens info if available

commit 132ecc0f9f0a2243c4f6745d0af36be810bf9eba
Author: Dennis Real <github@tildepipe.org>
Date:   Sun Feb 5 16:56:29 2012 +0100

    - improved handling of images which have exif tags but not ours
    - fixed uninitialzed pointer in thumbnail mode
    - added nikon lens info if available

3 files changed, 11 insertions, 4 deletions

diff --git a/src/exif.c b/src/exif.c
index 02154e4..9d26072 100644
--- a/src/exif.c
+++ b/src/exif.c
@@ -45,10 +45,10 @@ static void exif_trim_spaces(char *str)
   {
     if (*str != ' ')
     {
-      end = str;
+      end = str+1;
     }
   }
-  *++end = '\0';
+  *end = '\0';
 }
 
 
@@ -146,7 +146,7 @@ void exif_get_info(ExifData * ed, char *buffer, unsigned int maxsize)
   {
     return;
   }
-  else if (ed == NULL )
+  else if (ed == NULL)
   {
     snprintf(buffer, (size_t)maxsize, "%s\n", "No Exif data in file.");
     return;
@@ -187,6 +187,8 @@ void exif_get_info(ExifData * ed, char *buffer, unsigned int maxsize)
         {
           /* Digital Vari-Program */
           exif_get_mnote_tag(ed, 171, buffer + strlen(buffer), maxsize - strlen(buffer));
+          /* Lens */
+          exif_get_mnote_tag(ed, 132, buffer + strlen(buffer), maxsize - strlen(buffer));
         }
 
       }
diff --git a/src/filelist.c b/src/filelist.c
index 32bc2a5..9756c27 100644
--- a/src/filelist.c
+++ b/src/filelist.c
@@ -54,6 +54,9 @@ feh_file *feh_file_new(char *filename)
 	else
 		newfile->name = estrdup(filename);
 	newfile->info = NULL;
+#ifdef HAVE_LIBEXIF
+	newfile->ed = NULL;
+#endif
 	return(newfile);
 }
 
@@ -70,7 +73,7 @@ void feh_file_free(feh_file * file)
 	if (file->info)
 		feh_file_info_free(file->info);
 #ifdef HAVE_LIBEXIF
-	if (file->info)
+	if (file->ed)
 		exif_data_unref(file->ed);
 #endif		
 	free(file);
diff --git a/src/imlib.c b/src/imlib.c
index 0b60180..197b8f5 100644
--- a/src/imlib.c
+++ b/src/imlib.c
@@ -522,6 +522,8 @@ void feh_draw_exif(winwidget w)
 		return;
 	}
 
+
+	buffer[0] = '\0';
 	exif_get_info(FEH_FILE(w->file->data)->ed, buffer, MAX_EXIF_DATA);
 
 	fn = feh_load_font(w);