Fix scaling of negative starting latitude for Gaussian grids in g2print

Following the change in the preceding commit, this commit modifies the g2print
code to ensure that negative starting latitudes for Gaussian grids are scaled
appropriately.

ungrib/src/g2print.F

@@ -562,7 +562,7 @@ SUBROUTINE r_grib2(junit, gribflnm, hdate,  &
               endif
 
               ! Scale lat/lon values to 0-180, default range is 1e6.
-              if (map%lat1.ge.scale_factor) then 
+              if (abs(map%lat1).ge.scale_factor) then 
                  map%lat1 = map%lat1/scale_factor
               endif
               if (map%lon1.ge.scale_factor) then