Fix for math expr/ops error messages line/column numbers.

[seven-phases-max]

Fixes #1713.

[lukeapage]

Thanks,

btw @seven-phases-max don't feel dejected about the pull requests I haven't yet merged. My plan is to put the non-breaking changes into a 1.7 release and then the breaking ones into a 2.0-wip release. for 2.0 I also want to seperate the interface to the environment to allow a common interface that rhino/node/browser/.net implement. thats my plan anyway.. we also have the less docs and I'm re-writing recess as if I didn't have enough on my plate...

[Soviut]

Delegate! The biggest problem with open source? Ego-driven development. Sometimes you have to give the boring jobs to somebody.

[lukeapage]

@Soviut I'm more than happy to delegate but at the moment that would require more coordination (over what is in each release) and whomever reviews and pulls in the pull requests to be very careful. Also, technically I think myself and @seven-phases-max seem to be the only ones with enough technical knowledge of less to improve it. the only ego thing about it is that I am anxious to be careful over breaking changes. There are 3 or 4 other people who have commit rights to less but I assume from their lack of comments or action that they don't have the time or are leaving it to me.

[SomMeri]

@Soviut I had commits rights last months, but I'm still new to the codebase and had very fragmented time during that time. So, I limited myself to answering issues, writing docs and such.

I do not want to merge other peoples pull requests, because I know too little about code. In fact, I would consider it very good idea for someone else to review my changes once I will do them. Reviewing others code require more project code knowledge then writing your own changes, at least I think.

I plan to code more once it gets better, but will not merge pull requests until I closed at least some issues on my own.

[Synchro]

I'm a lurking committer... I'm really not up to speed on LESS internals, and I'm glad you're taking the lead @lukeapage, but I'm happy to deal with colour processing things that have come up. I'd also like to do more on the docs side. I'm in the middle of a big chunk of work at the moment so I've not managed to do much.

[seven-phases-max]

@lukeapage, sure, no problemo at all, with or without The Big Plan™. I can imagine how much time and efforts one has to waste only to cursory look through all those proposals and requests "randomly" thrown in. So I can only admire a patience and constancy of anyone taking that ungrateful and tiresome role of being the last line of defense against pervasive chaos :).