[SofaGraphComponent] Add missing SOFA_GRAPH_COMPONENT_API in class definition
[SofaGraphComponent] Add missing SOFA_GRAPH_COMPONENT_API in class definition

FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa,FabienPean/sofa