resolve conflicts between --no-internal-links and pedestrian crossings (trac #1730)

[behrisch]

it should be an error to set --no-internal-links and --crossings.guess
loading a network with crossings and setting --no-internal-links should remove crossings (and walkingAreas).

Migrated from http://sumo.dlr.de/ticket/1730

{
    "status": "closed", 
    "changetime": "2015-10-01T20:02:55Z", 
    "description": "it should be an error to set --no-internal-links and --crossings.guess\nloading a network with crossings and setting --no-internal-links should remove crossings (and walkingAreas).", 
    "reporter": "namdre", 
    "cc": "", 
    "resolution": "fixed", 
    "_ts": "1443729775214721", 
    "component": "net building (NETGEN, NETCONVERT)", 
    "summary": "resolve conflicts between --no-internal-links and pedestrian crossings", 
    "priority": "major", 
    "keywords": "", 
    "time": "2015-04-16T10:41:26Z", 
    "milestone": "0.25.0", 
    "owner": "namdre", 
    "type": "defect"
}

[behrisch]

@namdre committed a03519b (aka r18477):
preventing invalid networks from being built due to conflicting options. refs #1730

[behrisch]

@namdre committed 615d3fb (aka r18478):
whoopsie in [18477]. Now comes with a test. refs #1730

[behrisch]

@behrisch changed milestone from "0.24.0" to "0.25.0"

[behrisch]

• @namdre committed 83dd1ce (aka r18990):
  fix resolve conflicts between --no-internal-links and pedestrian crossings (trac #1730) #1730
• @namdre changed owner from "" to "namdre"
• @namdre changed resolution from "" to "fixed"
• @namdre changed status from "new" to "closed"