Restructure XCBWaitForReply to eliminate two gotos.
Restructure XCBWaitForReply to eliminate two gotos.

OpenInkpot-archive/iplinux-libxcb,topcat/xcb-win32,stapelberg/libxcb,topcat/xcb-win32,OpenInkpot-archive/iplinux-libxcb,stapelberg/libxcb,topcat/xcb-win32,topcat/xcb-win32,stapelberg/libxcb,OpenInkpot-archive/iplinux-libxcb,topcat/xcb-win32