[gegl] buffer: fix integer overflow in u32 blit scaler

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

commit 19cd85c09b6cb9dd430dff0ced59e2fa04597c8f
Author: Øyvind Kolås <pippin gimp org>
Date:   Sun May 24 05:30:37 2020 +0200

    buffer: fix integer overflow in u32 blit scaler

 gegl/buffer/gegl-algorithms.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/gegl/buffer/gegl-algorithms.c b/gegl/buffer/gegl-algorithms.c
index 90fb41f14..31a9d010f 100644
--- a/gegl/buffer/gegl-algorithms.c
+++ b/gegl/buffer/gegl-algorithms.c
@@ -1335,7 +1335,7 @@ gegl_resample_nearest (guchar              *dst,
 #define BOXFILTER_FUNCNAME   gegl_resample_boxfilter_u8
 #define BOXFILTER_TYPE       guchar
 #define BOXFILTER_TEMP_TYPE  guchar
-#define BOXFILTER_ROUND(val) ((int)((val)+0.5))
+#define BOXFILTER_ROUND(val) ((int)((val)+0.5f))
 #include "gegl-algorithms-boxfilter.inc"
 #undef BOXFILTER_FUNCNAME
 #undef BOXFILTER_TYPE
@@ -1345,7 +1345,7 @@ gegl_resample_nearest (guchar              *dst,
 #define BOXFILTER_FUNCNAME   gegl_resample_boxfilter_u16
 #define BOXFILTER_TYPE       guint16
 #define BOXFILTER_TEMP_TYPE  guint16
-#define BOXFILTER_ROUND(val) ((int)((val)+0.5))
+#define BOXFILTER_ROUND(val) ((int)((val)+0.5f))
 #include "gegl-algorithms-boxfilter.inc"
 #undef BOXFILTER_FUNCNAME
 #undef BOXFILTER_TYPE
@@ -1362,7 +1362,7 @@ static inline guint32 _gegl_trunc_u32(guint64 value)
 #define BOXFILTER_FUNCNAME   gegl_resample_boxfilter_u32
 #define BOXFILTER_TYPE       guint32
 #define BOXFILTER_TEMP_TYPE  guint64
-#define BOXFILTER_ROUND(val) _gegl_trunc_u32((val)+0.5)
+#define BOXFILTER_ROUND(val) _gegl_trunc_u32((val)+0.5f)
 #include "gegl-algorithms-boxfilter.inc"
 #undef BOXFILTER_FUNCNAME
 #undef BOXFILTER_TEMP_TYPE
@@ -1438,7 +1438,7 @@ static inline guint32 _gegl_trunc_u32(guint64 value)
 
 #define BILINEAR_FUNCNAME   gegl_resample_bilinear_u8
 #define BILINEAR_TYPE       guchar
-#define BILINEAR_ROUND(val) ((int)((val)+0.5))
+#define BILINEAR_ROUND(val) ((int)((val)+0.5f))
 #include "gegl-algorithms-bilinear.inc"
 #undef BILINEAR_FUNCNAME
 #undef BILINEAR_TYPE
@@ -1446,7 +1446,7 @@ static inline guint32 _gegl_trunc_u32(guint64 value)
 
 #define BILINEAR_FUNCNAME   gegl_resample_bilinear_u16
 #define BILINEAR_TYPE       guint16
-#define BILINEAR_ROUND(val) ((int)((val)+0.5))
+#define BILINEAR_ROUND(val) ((int)((val)+0.5f))
 #include "gegl-algorithms-bilinear.inc"
 #undef BILINEAR_FUNCNAME
 #undef BILINEAR_TYPE
@@ -1454,7 +1454,7 @@ static inline guint32 _gegl_trunc_u32(guint64 value)
 
 #define BILINEAR_FUNCNAME   gegl_resample_bilinear_u32
 #define BILINEAR_TYPE       guint32
-#define BILINEAR_ROUND(val) ((int)((val)+0.5))
+#define BILINEAR_ROUND(val) _gegl_trunc_u32((val)+0.5f)
 #include "gegl-algorithms-bilinear.inc"
 #undef BILINEAR_FUNCNAME
 #undef BILINEAR_TYPE