Fix compilation warning reported by gcc -Wunused-but-set-variable
Fix compilation warning reported by gcc -Wunused-but-set-variable

* process.c (printwaitn) [!SUNOS4]: Do not define "exited" variable.

TeamExodus/external_strace,gcode-mirror/strace-plus,Infinitive-OS/platform_external_strace,geekboxzone/lollipop_external_strace,pgbovine/strace-plus,gcode-mirror/strace-plus,MonkeyZZZZ/platform_external_strace,bigzz/strace_android,YUPlayGodDev/platform_external_strace,android-ia/platform_external_strace,Infinitive-OS/platform_external_strace,bigzz/strace_android,Andrey9kin/revisor,YUPlayGodDev/platform_external_strace,geekboxzone/mmallow_external_strace,AOSP-YU/platform_external_strace,Infinitive-OS/platform_external_strace,pgbovine/strace-plus,geekboxzone/mmallow_external_strace,bigzz/strace_android,jamel/strace-plus,cuviper/strace,kapdop/android_external_strace,DirtyUnicorns/android_external_strace,lkundrak/strace,lizh06/strace-plus,lizh06/strace-plus,Yu-AndroidM/android_external_strace,DirtyUnicorns/android_external_strace,pombredanne/strace,pombredanne/strace,TeamExodus/external_strace,jamel/strace-plus,pombredanne/strace,bnoordhuis/strace,pgbovine/strace-plus,jamel/strace-plus,AOSP-YU/platform_external_strace,gcode-mirror/strace-plus,geofft/strace,android-ia/platform_external_strace,CyanogenMod/android_external_strace,geofft/strace,DirtyUnicorns/android_external_strace,pgbovine/strace-plus,YUPlayGodDev/platform_external_strace,CyanogenMod/android_external_strace,Saruta/strace,timmattison/strace-arm,MonkeyZZZZ/platform_external_strace,vrastogi/strace,Andrey9kin/revisor,hjl-tools/strace,Saruta/strace,cuviper/strace,gcode-mirror/strace-plus,hjl-tools/strace,pgbovine/strace-plus,xin3liang/platform_external_strace,Yu-AndroidM/android_external_strace,bigzz/strace_android,lizh06/strace-plus,Andrey9kin/revisor,YUPlayGodDev/platform_external_strace,MonkeyZZZZ/platform_external_strace,lkundrak/strace,AOSP-YU/platform_external_strace,xin3liang/platform_external_strace,geofft/strace,xin3liang/platform_external_strace,timmattison/strace-arm,DirtyUnicorns/android_external_strace,lkundrak/strace,bnoordhuis/strace,geekboxzone/mmallow_external_strace,bnoordhuis/strace,Saruta/strace,Infinitive-OS/platform_external_strace,Distrotech/strace,kapdop/android_external_strace,xin3liang/platform_external_strace,geekboxzone/mmallow_external_strace,geofft/strace,timmattison/strace-arm,MonkeyZZZZ/platform_external_strace,Andrey9kin/revisor,jamel/strace-plus,lizh06/strace-plus,geekboxzone/lollipop_external_strace,geekboxzone/lollipop_external_strace,cuviper/strace,Yu-AndroidM/android_external_strace,CyanogenMod/android_external_strace,gcode-mirror/strace-plus,geekboxzone/lollipop_external_strace,TeamExodus/external_strace,AOSP-YU/platform_external_strace,geekboxzone/mmallow_external_strace,jamel/strace-plus,TeamExodus/external_strace,lizh06/strace-plus,android-ia/platform_external_strace,kapdop/android_external_strace,Distrotech/strace,DirtyUnicorns/android_external_strace,bnoordhuis/strace,Yu-AndroidM/android_external_strace,android-ia/platform_external_strace,kapdop/android_external_strace,kapdop/android_external_strace,lkundrak/strace,cuviper/strace,cuviper/strace,vrastogi/strace,hjl-tools/strace,android-ia/platform_external_strace,AOSP-YU/platform_external_strace,bigzz/strace_android,vrastogi/strace,CyanogenMod/android_external_strace,MonkeyZZZZ/platform_external_strace,vrastogi/strace,TeamExodus/external_strace,Distrotech/strace,YUPlayGodDev/platform_external_strace,CyanogenMod/android_external_strace,Saruta/strace,pombredanne/strace,Distrotech/strace,Infinitive-OS/platform_external_strace,Distrotech/strace,geofft/strace,Yu-AndroidM/android_external_strace,Saruta/strace,vrastogi/strace,geekboxzone/lollipop_external_strace