Temp fix for a GCC 15 ICE when compiling raylib4dc with -ffast-math

[tractorbeam0]

This file is important for loading models and most likely affects performance. This change is definitely temporary, just to get things working until the ICE is fixed. The error I got follows:

during RTL pass: reload
rmodels.c: In function ‘DrawBillboardPro’:
rmodels.c:3919:1: internal compiler error: in gen_reg_rtx, at emit-rtl.cc:1177
 3919 | }
      | ^
0x73a7145c5f74 __libc_start_call_main
        ../sysdeps/nptl/libc_start_call_main.h:58
0x73a7145c6026 __libc_start_main_impl
        ../csu/libc-start.c:360

This is the same fix as #131, fixed by applying a patch file to rmodels.c. Thanks to Bruce for linking to that PR and suggesting the same changes.

[tractorbeam0]

This would also resolve (at least, for now) #97