[Ohrrpgce] SVN: teeemcee/10413 Replace is_int with parse_int and rewrite str2int. Added a 'strict' argu

[subversion at HamsterRepublic.com]

teeemcee
2018-06-01 21:33:57 -0700 (Fri, 01 Jun 2018)
130
Replace is_int with parse_int and rewrite str2int. Added a 'strict' argument to disallow leading spaces/zeroes

And testcases too.
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U   wip/gfx_fb.bas
U   wip/gfx_sdl.bas
U   wip/gfx_sdl2.bas
U   wip/util.bas
U   wip/util.bi
U   wip/yetmore2.bas