fix for f77 issue on lxplus

Author: WolfgangWaltenberger

ReleaseNotes

@@ -1,6 +1,7 @@
 Release v3.1.1
 =======================================================
 
+  * in nllfast and pythia6 compiles, fix for systems with f77 compiler (thanks Jonas Wuerzinger)
   * added filter for slogdet warnings (relevant on MacOS)
   * Minor fixes in slha printer
   * Bumped up pythia8 from 8315 to 8316

smodels/lib/check_fortran_compiler.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
 
-command -v f77 && { exit 0; }
 command -v gfortran && { exit 0; }
 command -v ifort && { exit 0; }
+command -v f77 && { exit 0; }