Libcalls failing when xkb-switch is compiled with `-O2` flag

[grwlf]

Libcalls failing when xkb-switch is compiled with `-O2` flag

[lyokha]

I would also add this

diff --git a/XKbSwitchApi.cpp b/XKbSwitchApi.cpp
index 821bfd7..febcc26 100644
--- a/XKbSwitchApi.cpp
+++ b/XKbSwitchApi.cpp
@@ -73,6 +73,7 @@ namespace
             return symNames;
         }

+        loaded = true;
         xkb->build_layout(symNames);
         return symNames;
     }

to make the code clean, though this does not affect anything because vim's libcall() dlopens/dlcloses on each call.

@zoresvit, could you update the PR?

[lyokha]

This small patch must fix this (original idea from here, see how function accomodateGroupXkb() is used there after XkbLockGroup())

diff --git a/XKeyboard.cpp b/XKeyboard.cpp
index e3ce64b..0bbcb9f 100644
--- a/XKeyboard.cpp
+++ b/XKeyboard.cpp
@@ -128,6 +128,7 @@ void XKeyboard::set_group(int groupNum)
 {
   Bool result = XkbLockGroup(_display, _deviceId, groupNum);
   CHECK(result == True);
+  (void) get_group();
 }