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Function: irim_checkbphf

Purpose: check whether the BPHF is present and wanted

Category: IRAS, private to program: IMAGE

Author: Do Kester

Use:
int irim_checkbphf(
fchar irds,
fint snipnr )

returns: 1 : bphf is present
-1: bphf is not present but the snip should be processed
0 : bphf is not present and do not process this snip

Description:
It is checked whether the SRLON keyword is present for the
first tick at the snip level. If so the function returns a 1.
If not the user is asked whether to use intended positions;
the answer is accordingly.

Comment: This routine is NOT callable in FORTRAN.

Updates: 03 Dec 1991: DK, Creation date
18 Jun 1992: DK, search only at local level.
10 Aug 1992: DK, annoying non-error suppressed.