code cleanup: warnings and minor edits.

source/blender/blenlib/intern/math_geom.c

@@ -2012,7 +2012,7 @@ void fill_poly_v2i_n(
 
 		/* Build a list of nodes. */
 		nodes = 0; j = nr - 1;
-		for (i=0; i<nr; i++) {
+		for (i = 0; i < nr; i++) {
 			if ((verts[i][1] < pixel_y && verts[j][1] >= pixel_y) ||
 			    (verts[j][1] < pixel_y && verts[i][1] >= pixel_y))
 			{

source/blender/bmesh/intern/bmesh_iterators.c

@@ -73,6 +73,7 @@ int BM_iter_mesh_count(BMesh *bm, const char itype)
 		default:
 			count = 0;
 			BLI_assert(0);
+			break;
 	}
 
 	return count;

source/blender/bmesh/tools/bmesh_bisect_plane.c

@@ -121,9 +121,6 @@ static void bm_face_bisect_verts(BMesh *bm, BMFace *f, const float plane[4], con
 
 	l_first = BM_FACE_FIRST_LOOP(f);
 
-	(void)bm;
-	(void)plane;
-
 	/* add plane-aligned verts to the stack
 	 * and check we have verts from both sides in this face,
 	 * ... that the face doesn't only have boundry verts on the plane for eg. */

source/blender/editors/mesh/editmesh_tools.c

@@ -983,12 +983,6 @@ void MESH_OT_flip_normals(wmOperatorType *ot)
 	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
 }
 
-static const EnumPropertyItem direction_items[] = {
-	{false, "CW", 0, "Clockwise", ""},
-	{true, "CCW", 0, "Counter Clockwise", ""},
-	{0, NULL, 0, NULL, NULL}
-};
-
 /* only accepts 1 selected edge, or 2 selected faces */
 static int edbm_edge_rotate_selected_exec(bContext *C, wmOperator *op)
 {

source/blender/makesrna/intern/rna_mesh_api.c

@@ -130,7 +130,7 @@ void RNA_api_mesh(StructRNA *srna)
 	parm = RNA_def_float(func, "split_angle", M_PI, 0.0f, M_PI, "",
 	                     "Angle between polys' normals above which an edge is always sharp (180° to disable)",
 	                     0.0f, M_PI);
-	RNA_def_property_subtype(parm, PROP_UNIT_ROTATION);
+	RNA_def_property_subtype(parm, (PropertySubType)PROP_UNIT_ROTATION);
 
 	func = RNA_def_function(srna, "free_normals_split", "rna_Mesh_free_normals_split");
 	RNA_def_function_ui_description(func, "Free split vertex normals");