[gegl] ppm-load: silence gcc warning

[Øyvind Kolås <ok src gnome org>]

commit 2a16542cdcddec6690debb7c913a6d0836148e46
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Apr 5 23:50:47 2018 +0200

    ppm-load: silence gcc warning
    
    the .bpc field of the ppm struct is being suspected of being used uninitialized
    even though we bail if loading header doesnt succeed - pre-initialize to 1 to
    avoid warnings.

 operations/external/ppm-load.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/operations/external/ppm-load.c b/operations/external/ppm-load.c
index 146568e..5d4a408 100644
--- a/operations/external/ppm-load.c
+++ b/operations/external/ppm-load.c
@@ -225,6 +225,8 @@ get_bounding_box (GeglOperation *operation)
   pnm_struct    img;
   FILE         *fp;
 
+  img.bpc = 1;
+
   fp = (!strcmp (o->path, "-") ? stdin : fopen (o->path,"rb") );
 
   if (!fp)
@@ -276,6 +278,8 @@ process (GeglOperation       *operation,
   GeglRectangle rect = {0,0,0,0};
   gboolean      ret = FALSE;
 
+  img.bpc = 1;
+
   fp = (!strcmp (o->path, "-") ? stdin : fopen (o->path,"rb"));
 
   if (!fp)