In particular, the cpu_history array has length 59, so when i = 58, cpu_history[i+1] is undefined. From http://sources.debian.net/src/wmgtemp/1.1-3/debian/patches/fix_-Waggressive-loop-optimizations.patch/  | 
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| .. | ||
| wmgeneral | ||
| .deps | ||
| Makefile | ||
| wmgtemp-interface-mask.xbm | ||
| wmgtemp-interface.xpm | ||
| wmgtemp.c | ||