don't use input windows on Qt < 4.8.3
author Thomas Lübking
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committer Thomas Lübking
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commit 9b2f9cc354cbb1a4032b8238299b5f57f68cb10b
tree b20c97ad40288d0562f730b18272e397450054e2
parent e7c775631eea5ab983688e08199cd4e0b9939fc5
don't use input windows on Qt < 4.8.3

According to aacid, it's been broken in every Qt version before

BUG: 312784
REVIEW: 108249
kwin/client.cpp