Merge pull request #252 from jvdp1/issues

Issue with logger s configuration subroutine

Author: jvdp1

doc/specs/stdlib_logger.md

@@ -309,7 +309,8 @@ Pure subroutine
 `log_units` (optional): shall be a rank one allocatable array
   variable of type default integer. It is an `intent(out)`
   argument. On return it shall be the elements of the `self`'s `log_units`
-  array.
+  array. If there were no elements in `self`'s `log_units`, a
+  zero-sized array is returned.
 
 #### Example
 

src/stdlib_logger.f90

@@ -434,7 +434,11 @@ pure subroutine configuration( self, add_blank_line, indent, &
         if ( present(indent) ) indent = self % indent_lines
         if ( present(max_width) ) max_width = self % max_width
         if ( present(time_stamp) ) time_stamp = self % time_stamp
-        if ( present(log_units) ) log_units = self % log_units(1:self % units)
+        if ( present(log_units) .and. self % units .gt. 0 ) then
+            log_units = self % log_units(1:self % units)
+        else
+            allocate(log_units(0))
+        end if
 
     end subroutine configuration