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Author SHA1 Message Date
h_vogt 8b709a394f cpitf.c, cp_istrue(), avoid surplus Warning Message when an `if' condition expands to nothing 
When in expression
  if $var ...
the variable `var' was undefined, then
ngspice printed a surplus warning message
>  Warning: NULL arithmetic expression
in addition to the error message
>  Error: var: no such variable.

ngspice continues to process the conditional construct
  and evaluates the condition as "FALSE"
 2016-03-26 21:58:39 +01:00
rlar dbb958fff8 introduce examples/control_structs/if-test-1.cir 2016-03-26 21:58:11 +01:00