Fix for realopl-Wunused-value#160
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src/realopl.cpp: In member function ‘bool CRealopl::harddetect()’:
src/realopl.cpp:49:23: warning: statement has no effect [-Wunused-value]
49 | # define INP(reg) 0
| ^
src/realopl.cpp:95:5: note: in expansion of macro ‘INP’
95 | INP(adp);
| ^~~
src/realopl.cpp:88:19: warning: unused variable ‘adp’ [-Wunused-variable]
88 | unsigned short adp = (currChip == 0 ? adlport : adlport + 2);
| ^~~
src/realopl.cpp: In member function ‘void CRealopl::hardwrite(int, int)’:
src/realopl.cpp:49:23: warning: statement has no effect [-Wunused-value]
49 | # define INP(reg) 0
| ^
src/realopl.cpp:180:5: note: in expansion of macro ‘INP’
180 | INP(adp);
| ^~~
src/realopl.cpp:49:23: warning: statement has no effect [-Wunused-value]
49 | # define INP(reg) 0
| ^
src/realopl.cpp:185:5: note: in expansion of macro ‘INP’
185 | INP(adp);
| ^~~
src/realopl.cpp:163:18: warning: unused variable ‘adp’ [-Wunused-variable]
163 | unsigned short adp = (currChip == 0 ? adlport : adlport + 2);
| ^~~
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Fix these warnings: