change comment so it does not trip up GNU (GEOS_CatchCNCLM51GridComp.F90)

Author: gmao-rreichle

GEOSagcm_GridComp/GEOSphysics_GridComp/GEOSsurface_GridComp/GEOSland_GridComp/GEOScatchCN_GridComp/GEOScatchCNCLM51_GridComp/GEOS_CatchCNCLM51GridComp.F90

@@ -9204,7 +9204,7 @@ subroutine LT2lon( UTC_HH, UTC_MI, UTC_S, local_hour, longitude, rc )
 
     real,    intent(out)           :: longitude               ! [degree]  -pi <  longitude <= +pi 
 
-    integer, intent(out), optional :: rc                      ! return code for _ASSERT()
+    integer, intent(out), optional :: rc                      ! return code for MAPL ASSERT()
 
     ! ----------------------------------------------