[clang-warning-fix][invalid-narrowing-conversion]
[clang-warning-fix][invalid-narrowing-conversion]

Clang and MinGW complain about the 0xdfdfdfdf since they interpret it as an unsigned long. Expanded the hex literals and used C-style casts to match the style of the file.

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