Handle 186 -Wextra-semi-stmt warnings from clang

• DeqAsyncHandler: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• Data: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• set_toupper: add do { ... } while (0) to avoid -Wextra-semi-stmt warnings
• BufAlloc: add do { ... } while (0) to avoid -Wextra-semi-stmt warnings
• _XkbCheckPendingRefresh: add do ... while (0) to avoid -Wextra-semi-stmt
• OneDataCard32: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• _XCreateMutex/_XFreeMutex: remove trailing semicolon from definitions
• GetFunc: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• PutCommandResource: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• poly.h: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• RETURN: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• CI_GET_*_INFO_*: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• xcb_io.c: add do ... while (0) to avoid -Wextra-semi-stmt warnings
• DL_APPEND/DL_DELETE: remove trailing semicolon from definitions
• Xrm.c: remove unnecessary ; after {}
• XIM_SET_PAD: add do ... while (0) to avoid -Wextra-semi-stmt warnings