Fix 9001: memory exhausted on changelog.

The bug data cache is dropped at each iteration so the
memory consumption is lowered


git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@5190 f5dc347c-c33d-0410-90a0-b07cc1902cb9

core/custom_function_api.php

@@ -58,6 +58,9 @@ function custom_function_default_changelog_print_issue( $p_issue_id, $p_issue_le
 		}
 
 		echo ' - ', get_enum_element( 'status', $t_bug->status ), '.<br />';
+
+		// do not cache bug data to save memory
+		bug_clear_cache( $p_issue_id );
 	}
 
 	# --------------------
@@ -94,6 +97,9 @@ function custom_function_default_roadmap_print_issue( $p_issue_id, $p_issue_leve
 		}
 
 		echo ' - ', get_enum_element( 'status', $t_bug->status ), $t_strike_end, '.<br />';
+
+		// do not cache bug data to save memory
+		bug_clear_cache( $p_issue_id );
 	}
 
 	# --------------------