Initial porting of new interpolations and resize spline, from IMv6 to IMv7
Not quite finished with spline, blend, and background

diff --git a/MagickCore/resample.h b/MagickCore/resample.h
index 7701612..89316bf 100644
--- a/MagickCore/resample.h
+++ b/MagickCore/resample.h
@@ -26,7 +26,7 @@
 
 /*
   WARNING:  The order of this table must also match the order of a table
-  located in AcquireResizeFilter() or "resize.c" otherwise the users filter
+  located in AcquireResizeFilter() in "resize.c" otherwise the users filter
   will not match the actual filter that is setup.
 */
 typedef enum
@@ -60,6 +60,7 @@
   RobidouxFilter,
   RobidouxSharpFilter,
   CosineFilter,
+  SplineFilter,
   SentinelFilter  /* a count of all the filters, not a real filter */
 } FilterTypes;