Removed casting warnings from transform_manipulator.

PET is now checked as a transform flag during transform. Much cleaner that way for NOPET context (extrude, duplicate)
Added Sphere as a new PET falloff mode (icon and all) and reordered them around in a more logical fashion (IMHO).

Also brought back Subsurf toggle with Shift-O (was supposed to be for PET object mode but that was canned).

source/blender/include/BIF_transform.h

@@ -57,10 +57,11 @@
 
 /* TRANSFORM PROPORTIONAL FALLOFF MODES */
 #define PROP_SHARP		0
-#define PROP_SMOOTH		1
+#define PROP_LIN		1
 #define PROP_ROOT		2
-#define PROP_LIN		3
+#define PROP_SPHERE		3
 #define PROP_CONST		4
+#define PROP_SMOOTH		5
 
 void Transform(int mode, int context);