fix: repair XIM context lifecycle

tests/xim_test.c

@@ -0,0 +1,38 @@
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <xkbcommon/xkbcommon-keysyms.h>
+#include "../xim/keymap.h"
+
+enum
+{
+	ShiftMask = 1<<0,
+	LockMask = 1<<1,
+	Group1 = 1<<13,
+};
+
+int
+main(void)
+{
+	static const uint32_t letters[] = {
+		XKB_KEY_a, XKB_KEY_A, XKB_KEY_Cyrillic_ef, XKB_KEY_Cyrillic_EF,
+	};
+	static const uint32_t inferred[] = { XKB_KEY_a, XKB_KEY_NoSymbol };
+	static const uint32_t punctuation[] = { XKB_KEY_1, XKB_KEY_exclam };
+	static const uint32_t missing[] = {
+		XKB_KEY_a, XKB_KEY_A, XKB_KEY_NoSymbol, XKB_KEY_NoSymbol,
+	};
+
+	assert(keymaplookup(letters, 4, 0) == XKB_KEY_a);
+	assert(keymaplookup(letters, 4, ShiftMask) == XKB_KEY_A);
+	assert(keymaplookup(letters, 4, LockMask) == XKB_KEY_A);
+	assert(keymaplookup(letters, 4, LockMask|ShiftMask) == XKB_KEY_a);
+	assert(keymaplookup(letters, 4, Group1) == XKB_KEY_Cyrillic_ef);
+	assert(keymaplookup(letters, 4, Group1|ShiftMask) == XKB_KEY_Cyrillic_EF);
+	assert(keymaplookup(inferred, 2, ShiftMask) == XKB_KEY_A);
+	assert(keymaplookup(punctuation, 2, LockMask) == XKB_KEY_1);
+	assert(keymaplookup(punctuation, 2, LockMask|ShiftMask) == XKB_KEY_exclam);
+	assert(keymaplookup(missing, 4, Group1) == XKB_KEY_a);
+	assert(keymaplookup(NULL, 0, 0) == XKB_KEY_NoSymbol);
+	return 0;
+}