Fix visibility support check

Signed-off-by: Ray-V <ray-v@inbox.lv>
(cherry picked from commit 80a742849d)

acinclude.m4.in

@@ -3369,9 +3369,9 @@ if $PKG_CONFIG --exists tqt-mt ; then
           AC_TRY_COMPILE(
           [
 #include <tqglobal.h>
-#if Q_EXPORT - 0 != 0
-/* if this compiles, then Q_EXPORT is undefined */
-/* if Q_EXPORT is nonempty, this will break compilation */
+#if TQ_EXPORT - 0 != 0
+/* if this compiles, then TQ_EXPORT is undefined */
+/* if TQ_EXPORT is nonempty, this will break compilation */
 #endif
           ], [/* Elvis is not dead, he just went home! (Men In Black, 1997) */],
           kde_cv_val_tqt_gcc_visibility_patched=no, kde_cv_val_tqt_gcc_visibility_patched=yes)