fp-image: Remove config.h inclusion in fpi-header

And also avoid defining a function we expose depending on it's presency.

libfprint/fp-image.c

@@ -24,6 +24,7 @@
 #include "fpi-image.h"
 #include "fpi-log.h"
 
+#include <config.h>
 #include <nbis.h>
 
 /**

libfprint/fpi-image.c

@@ -24,6 +24,7 @@
 #include "fpi-log.h"
 
 #include <nbis.h>
+#include <config.h>
 
 #ifdef HAVE_PIXMAN
 #include <pixman.h>
@@ -107,12 +108,12 @@ fpi_mean_sq_diff_norm (const guint8 *buf1,
   return res / size;
 }
 
-#ifdef HAVE_PIXMAN
 FpImage *
 fpi_image_resize (FpImage *orig_img,
                   guint    w_factor,
                   guint    h_factor)
 {
+#ifdef HAVE_PIXMAN
   int new_width = orig_img->width * w_factor;
   int new_height = orig_img->height * h_factor;
   pixman_image_t *orig, *resized;
@@ -145,5 +146,9 @@ fpi_image_resize (FpImage *orig_img,
   pixman_image_unref (resized);
 
   return newimg;
-}
+#else
+  fp_err ("Libfprint compiled without pixman support, impossible to resize");
+
+  return g_object_ref (orig_img);
 #endif
+}

libfprint/fpi-image.h

@@ -20,7 +20,6 @@
 
 #pragma once
 
-#include <config.h>
 #include "fp-image.h"
 
 /**
@@ -77,8 +76,6 @@ gint fpi_mean_sq_diff_norm (const guint8 *buf1,
                             const guint8 *buf2,
                             gint          size);
 
-#if HAVE_PIXMAN
 FpImage *fpi_image_resize (FpImage *orig,
                            guint    w_factor,
                            guint    h_factor);
-#endif