Don't call DGEMM with zero matrix sizes
Don't call DGEMM with zero matrix sizes

johannrudi/libsc,cburstedde/libsc,holke/libsc,cburstedde/libsc,cburstedde/libsc,cburstedde/libsc,johannrudi/libsc,cburstedde/libsc,johannrudi/libsc,johannrudi/libsc,johannrudi/libsc,holke/libsc,holke/libsc,holke/libsc