[fpc-devel] patch for ReadInteger in sysformt.inc

[Markus Beth]

Hi,

latest profiling of one of our FPC applications showed ReadInteger (in 
rtl/objpas/sysutils/sysformt.inc) to be a performance bottleneck. Using 
Pos(Fmt[chpos],'1234567890')<>0 to check if Fmt[chpos] is a digit is 
somewhat time consuming. I replaced it with two char comparisons with 
'0' and '9'.
The rest of the patch only unifies the casing of the variable chpos.

Markus
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