Function fix_ptrptr_to_struct

* Due to 4432619, the 6.1 compiler will sometimes incorrectly generate pointer * stabs. Given a struct foo, and a corresponding typedef struct foo foo_t. * In some cases, when faced with a pointer to a foo_t, the compiler will * sometimes generate a stab that describes a pointer to a struct foo. * Regardless of correctness, this breaks merges, as it occurs inconsistently * by file. The foll