Fixed the case in which the KCL is not enabled
enable compilation with MS Visual Studio 2008
Implemented a new check for the KCL Verification, based on the maximum of the unknown current branches at each voltage node.
Please note that this check introduces the theoretically correct check, but, since achieving this target involves the perfect knowledge of every model,
 we can use this suboptimal and practical check (to be extended with the other possible unknown current branches)
Implemented a new check for the KCL Verification, based on the maximum of the unknown current branches at each voltage node.
Please note that this check introduces the theoretically correct check, but, since achieving this target involves the perfect knowledge of every model,
 we can use this suboptimal and practical check (to be extended with the other possible unknown current branches)
Merge remote branch 'origin/new_kirchhoff-3' into new_kirchhoff-3

Conflicts:
	src/maths/ni/niconv.c