#3767 Fails to compile with GCC 14 due to pic16 bug

[Philipp Klaus Krause]

A bug in the pic16 port (assignment between different pointer types without explicit cast), makes compilation fail with GCC 14:

glue.c: In function ‘pic16glue’:
glue.c:1805:11: error: assignment to ‘memmap *’ from incompatible pointer type ‘reg_info *’ [-Wincompatible-pointer-types]
 1805 |       reg = newReg (REG_SFR, PO_SFR_REGISTER, ramsize-1, "_sram_end", 0, 0, NULL);
      |           ^

[Philipp Klaus Krause]

I tried to fix this in [r14957]. SDCC with teh pic16 port enabled now compiles with GCC 14. Don't know if the fix is correct, but there are no regressions.
I think the global reg memmap isn't used by the pic16 port at all, so using it as temporary storage in src/pic16/glue.c just worked without side effects.