Print an error if the called program segfaults

[mkst]

e.g. wine spat out the following when snas.exe crashed out, but wibo was silent.

wine: Unhandled page fault on write access to 000000A8 at address 00419B2F (thread 010c), starting debugger...
00bc:err:clipboard:convert_selection Timed out waiting for SelectionNotify event
00bc:err:clipboard:convert_selection Timed out waiting for SelectionNotify event
Unhandled exception: page fault on write access to 0x000000a8 in 32-bit code (0x00419b2f).
Register dump:
 CS:0023 SS:002b DS:002b ES:002b FS:006b GS:0063
 EIP:00419b2f ESP:0077fe18 EBP:00000000 EFLAGS:00010246(  R- --  I  Z- -P- )
 EAX:00000128 EBX:00000001 ECX:000000a0 EDX:00be458c
 ESI:00bffd50 EDI:00bd4638
Stack dump:
0x0077fe18:  00431558 00bd4638 00bd4650 00000001
0x0077fe28:  0041bf1f 00bd386c 00000001 0077fe94
0x0077fe38:  003fe000 00000000 00000000 0041afb3
0x0077fe48:  00000009 0077fe94 003fe000 00bd386c
0x0077fe58:  00000001 0077fe20 0041af87 0077ff20
0x0077fe68:  00000000 56433230 00000000 0000001e
Backtrace:
=>0 0x00419b2f EntryPoint+0xffffffff() in ps2eeas (0x00000000)
0x00419b2f EntryPoint+0xffffffff in ps2eeas: movl       %eax,0x8(%ecx)
Modules:
Module  Address                 Debug info      Name (6 modules)
PE        400000-  569000       Export          ps2eeas
PE      63480000-6349b000       Deferred        version
PE      70b40000-70df9000       Deferred        ucrtbase
PE      7b000000-7b348000       Deferred        kernelbase
PE      7b600000-7b929000       Deferred        kernel32
PE      7bc00000-7bea9000       Deferred        ntdll
Threads:
process  tid      prio (all id:s are in hex)
00000020 ee-gcc2953.exe
        00000024    0
00000038 services.exe
        0000003c    0
        00000040    0
        0000004c    0
        00000068    0
        00000084    0
        000000b0    0
        000000e0    0
00000044 winedevice.exe
        00000048    0
        00000054    0
        00000058    0
        0000005c    0
00000060 plugplay.exe
        00000064    0
        00000070    0
        00000074    0
        00000078    0
        0000009c    0
0000007c winedevice.exe
        00000080    0
        00000090    0
        00000094    0
        00000098    0
        000000a4    0
00000088 explorer.exe
        0000008c    0
        000000bc    0
        000000d0    0
000000a8 svchost.exe
        000000ac    0
        000000b4    0
        000000b8    0
000000c0 conhost.exe
        000000c4    0
000000d8 rpcss.exe
        000000dc    0
        000000e8    0
        000000ec    0
        000000f0    0
        000000f4    0
        00000100    0
00000108 (D) Z:\home\user\dogcomp\tools\ee-gcc2.95.3\ee\gcc\ee\bin\ps2eeas.exe
        0000010c    0 <==
        00000118    0
System information:
    Wine build: wine-6.0.3 (Ubuntu 6.0.3~repack-1)
    Platform: i386
    Version: Windows 7
    Host system: Linux
    Host version: 6.6.87.2-microsoft-standard-WSL2