replaced getline with fscanf #1136

[JayHuLBL]

The alternative of getline() function include function fscanf() and fgets(). However, both of them requires to specify the object with length, to store the result:

int fscanf ( FILE * stream, const char * format, ... ); ...
The additional arguments should point to already allocated objects ...

char * fgets ( char * str, int num, FILE * stream );

fscanf() is used here since it is relatively safe to specify the maximum length of the first section (before first empty space) of each line.

[mwetter]

@JayHuLBL This is not save against buffer overflow. Look into using fgets and reallocate memory as needed.

[JayHuLBL]

@mwetter It's ready for review.

[JayHuLBL]

@mwetter It has been updated to avoid memory leakage.

The model IBPSA.BoundaryConditions.WeatherData.BaseClasses.Examples.GetTimeSpanTMY3 can run with JModelica without problem.

[mwetter]

@JayHuLBL Please also make sure that the failing tests work again.

[JayHuLBL]

Close this PR as it will be addressed in #1138.