Cleanup: rename eRegionType -> eRegion_Type

Match eSpace_Type.

source/blender/editors/screen/screen_ops.c

@@ -4410,7 +4410,7 @@ static void SCREEN_OT_region_context_menu(wmOperatorType *ot)
  * Animation Step.
  * \{ */
 static bool screen_animation_region_supports_time_follow(eSpace_Type spacetype,
-                                                         eRegionType regiontype)
+                                                         eRegion_Type regiontype)
 {
   return (regiontype == RGN_TYPE_WINDOW &&
           ELEM(spacetype, SPACE_SEQ, SPACE_GRAPH, SPACE_ACTION, SPACE_NLA)) ||
@@ -4418,7 +4418,7 @@ static bool screen_animation_region_supports_time_follow(eSpace_Type spacetype,
 }
 
 static bool match_region_with_redraws(const ScrArea *area,
-                                      eRegionType regiontype,
+                                      eRegion_Type regiontype,
                                       eScreen_Redraws_Flag redraws,
                                       bool from_anim_edit)
 {

source/blender/makesdna/DNA_screen_types.h

@@ -650,7 +650,7 @@ enum {
 
 /* regiontype, first two are the default set */
 /* Do NOT change order, append on end. Types are hardcoded needed */
-typedef enum eRegionType {
+typedef enum eRegion_Type {
   RGN_TYPE_WINDOW = 0,
   RGN_TYPE_HEADER = 1,
   RGN_TYPE_CHANNELS = 2,
@@ -668,7 +668,7 @@ typedef enum eRegionType {
   RGN_TYPE_TOOL_HEADER = 12,
 
 #define RGN_TYPE_LEN (RGN_TYPE_TOOL_HEADER + 1)
-} eRegionType;
+} eRegion_Type;
 
 /* use for function args */
 #define RGN_TYPE_ANY -1