malloc(0) and divide by zero

[cuanduo]

if we set SampleRate = 0; in vgmplay.ini will cause divide by zero
as follows

Program received signal SIGFPE, Arithmetic exception.
0x0000555555564274 in SamplePbk2VGM_I (SampleVal=0) at VGMPlay.c:3969
3969		return (INT32)((INT64)SampleVal * VGMSmplRateDiv / VGMSmplRateMul);
(gdb) bt
#0  0x0000555555564274 in SamplePbk2VGM_I (SampleVal=0) at VGMPlay.c:3969
#1  0x00005555555650a5 in InterpretVGM (SampleCount=0) at VGMPlay.c:4741
#2  0x0000555555564487 in InterpretFile (SampleCount=0) at VGMPlay.c:4178
#3  0x000055555555c427 in PlayVGM () at VGMPlay.c:1058
#4  0x000055555555a6d7 in PlayVGM_UI () at VGMPlayUI.c:2132
#5  0x0000555555556d25 in main (argc=3, argv=0x7fffffffe048) at VGMPlayUI.c:530
(gdb) p VGMSmplRateMul 
$20 = 0

if set SampleRate = 1; and commandline with -LogSound:1 will cause malloc(0) and may cause heap overflow

Breakpoint 6, __GI___libc_malloc (bytes=0) at malloc.c:3028
3028	malloc.c: No such file or directory.
(gdb) bt
#0  __GI___libc_malloc (bytes=0) at malloc.c:3028
#1  0x000055555555a96e in PlayVGM_UI () at VGMPlayUI.c:2222
#2  0x0000555555556d25 in main (argc=3, argv=0x7fffffffe048) at VGMPlayUI.c:530

[ValleyBell]

Well, if you want to break VGMPlay, there are more creative ways to do it. Like partially broken VGMs, for example.
Setting the sample rate to anything smaller than 1000 won't result in any useful sound anyway.

So I consider this a "not worth fixing", as nobody sane would use those configurations. (And I verified that with SampleRate = 1, the buffer is never used.)

I also edited your post with code blocks, so that it doesn't do unwanted references to other issues.