Uninitialized local variables

had a lot of such warnings: 
```cli
Warning	13	warning C4700: uninitialized local variable 'val' used	c:\users\...\downloads\php-sapnwrfc-master\sapnwrfc.c	716	1	php-sapnwrfc
```

With this the warnings are gone -> ***but please double check if it doesnt break anything***