[GRASS5] [bug #970] (grass) nviz cutting planes freeze

[Request Tracker]

this bug's URL: http://intevation.de/rt/webrt?serial_num=970
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Subject: nviz cutting planes freeze

Platform: Linux/Intel
Linux distro: RedHat
linux cpu: Intel (i486, i586, pentium ...)
Xwindows version: Xfree 4.0.x
Xwindows manager: GNOME
TclTk version: tcl/tk 8.3
grass downloaded at: Trento site
grass binary for platform: I compiled the sources myself
c compiler name: gcc

nviz freezes when cutting plane is on and an additional surface is added (for example there are two surfaces and one cutting plane and I do New surface, add a constant, it creates it and then nviz freezes all its windows - graphical and all menus)

The fix may be complicated, because there is obviously a problem to apply the cutting
plane to newly created surface. Quick fix may be just to give a message to user that new 
surface cannot be added when cutting planes are on.

Helena

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