Fix T44361: array modifier "fit curve" mode not working properly

'tot_length / step_length' gives the number of 'segments', not the number of
copies - we have to add 1 here.

source/blender/modifiers/intern/MOD_array.c

@@ -501,7 +501,7 @@ static DerivedMesh *arrayModifier_doArray(
 		if (dist > eps) {
 			/* this gives length = first copy start to last copy end
 			 * add a tiny offset for floating point rounding errors */
-			count = (length + eps) / dist;
+			count = (length + eps) / dist + 1;
 		}
 		else {
 			/* if the offset has no translation, just make one copy */