[gegl] gegl, operations, tools: Fix signed/unsigned comparisons

[Øyvind "pippin" Kolås <ok src gnome org>]

commit d4e80db660f787156e5c8293b18dc82498f7ec97
Author: Félix Piédallu <felix piedallu me>
Date:   Wed Jul 17 10:41:43 2019 +0200

    gegl, operations, tools: Fix signed/unsigned comparisons

 gegl/gegl-op.h                         | 2 +-
 operations/workshop/voronoi-diagram.cc | 4 ++--
 tools/exp_combine.cpp                  | 5 +++--
 3 files changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/gegl/gegl-op.h b/gegl/gegl-op.h
index 2c33b1c1b..387e39e17 100644
--- a/gegl/gegl-op.h
+++ b/gegl/gegl-op.h
@@ -320,7 +320,7 @@ static GType enum_name ## _get_type (void)               \
     };                                                            \
     if (gegl_op_gettext_package)                                  \
       {                                                           \
-        gint i;                                                   \
+        guint i;                                                   \
         for (i = 0; i < G_N_ELEMENTS (values); i++)               \
           if (values[i].value_name)                               \
             values[i].value_name =                                \
diff --git a/operations/workshop/voronoi-diagram.cc b/operations/workshop/voronoi-diagram.cc
index a33ab1979..5362facb0 100644
--- a/operations/workshop/voronoi-diagram.cc
+++ b/operations/workshop/voronoi-diagram.cc
@@ -148,8 +148,8 @@ process (GeglOperation       *operation,
   const Babl     *format      = gegl_buffer_get_format (output);
   const Babl     *dist_format = babl_format ("Y u32");
   const Babl     *aux_format  = aux ? gegl_buffer_get_format (aux) : format;
-  gint            bpp         = babl_format_get_bytes_per_pixel (format);
-  gint            aux_bpp     = babl_format_get_bytes_per_pixel (aux_format);
+  guint           bpp         = babl_format_get_bytes_per_pixel (format);
+  guint           aux_bpp     = babl_format_get_bytes_per_pixel (aux_format);
   GeglBuffer     *dist;
   guint8          mask[64];
 
diff --git a/tools/exp_combine.cpp b/tools/exp_combine.cpp
index 6fd0df04c..e041295e8 100644
--- a/tools/exp_combine.cpp
+++ b/tools/exp_combine.cpp
@@ -108,6 +108,7 @@ main (int    argc,
                                   NULL);
 
   for (cursor = ARG_PATH_0; cursor < argc; ++cursor)
+  for (cursor = ARG_PATH_0; cursor < unsigned(argc); ++cursor)
     {
       const gchar *input_path;
       gchar        ev_string[G_ASCII_DTOSTR_BUF_SIZE + 1];
@@ -143,7 +144,7 @@ main (int    argc,
                       "%s%u",
                       COMBINER_INPUT_PREFIX,
                       cursor - ARG_PATH_0);
-      if (err < 1 || err >= G_N_ELEMENTS (combiner_pad))
+      if (err < 1 || unsigned(err) >= G_N_ELEMENTS (combiner_pad))
         {
           g_warning ("Unable to construct input pad name for exposure %u\n",
                      cursor);
@@ -158,7 +159,7 @@ main (int    argc,
 
 
   /* We should not have skipped past the last element of the arguments */
-  g_return_val_if_fail (cursor == argc, EXIT_FAILURE);
+  g_return_val_if_fail (cursor == unsigned(argc), EXIT_FAILURE);
   sink     = gegl_node_new_child (gegl,
                                   "operation", "gegl:save",
                                   "path", argv[ARG_OUTPUT],