Remove duplicates from AC_CHECK_HEADERS
Remove duplicates from AC_CHECK_HEADERS

mathstuf/oce,finetjul/oce,finetjul/oce,EvgeneOskin/oce,BenoitPerrot/oce,Tech-XCorp/oce,finetjul/oce,heartvalve/oce,Tridify/oce,Tridify/oce,Tech-XCorp/oce,BenoitPerrot/oce,finetjul/oce,EvgeneOskin/oce,mathstuf/oce,BenoitPerrot/oce,Tech-XCorp/oce,tpaviot/oce,EvgeneOskin/oce,tpaviot/oce,BenoitPerrot/oce,mathstuf/oce,EvgeneOskin/oce,finetjul/oce,Tridify/oce,Tridify/oce,tpaviot/oce,tpaviot/oce,Tech-XCorp/oce,tpaviot/oce,heartvalve/oce,mathstuf/oce,heartvalve/oce,EvgeneOskin/oce,mathstuf/oce,heartvalve/oce,Tridify/oce,Tech-XCorp/oce,heartvalve/oce,BenoitPerrot/oce