Typo again

Author: Gbury

middle_end/flambda/types/inlining/inlining_arguments.ml

@@ -113,7 +113,7 @@ module Args = struct
       prim_cost = t1_prim_cost;
       branch_cost = t1_branch_cost;
       indirect_call_cost = t1_indirect_call_cost;
-      poly_compare_cost = t1_poly_copare_cost;
+      poly_compare_cost = t1_poly_compare_cost;
       small_function_size = t1_small_function_size;
       large_function_size = t1_large_function_size;
       threshold = t1_threshold;