Error when using make_runoff.m

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Hi all!
My pre-processing process reported an error, when I make a river file. And I found that the comments in the locate_runoff.m about the direction of the river did not match the information in the matlab command lines.And I want to know if it is the reason of the error.

for example:

"River Han Choose the orientation of the flow 0=zonal or 1=meridional. 1"

while in ...\croco_tools-v1.3\Rivers\locate_runoff.m:

if dir(1)==0 if insea if dir(2)==-1 %est - west => TESTED