[mingw-warning-fix][unknown-pragma]
[mingw-warning-fix][unknown-pragma]

The #pragma warnings are specific to MSVC; these #pragmas account for roughly half of the produced warnings when compiling with OCE_EXTRA_WARNINGS on MinGW.

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