Replace some instances of fopen with ci_fopen to handle NULL filenames.
Replace some instances of fopen with ci_fopen to handle NULL filenames.

OutOfOrder/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue,humble/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue,OutOfOrder/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue,humble/ags-geminirue