BUG: When detecting if qmake executable is changed, don't error if path

      contains regex chars.

Modules/FindQt4.cmake

@@ -328,9 +328,9 @@ FIND_PROGRAM(QT_QMAKE_EXECUTABLE NAMES qmake qmake4 qmake-qt4 PATHS
 
 IF (QT_QMAKE_EXECUTABLE)
 
-  IF(QT_QMAKE_EXECUTABLE_LAST AND NOT QT_QMAKE_EXECUTABLE_LAST MATCHES "^${QT_QMAKE_EXECUTABLE}$")
-    SET(QT_QMAKE_CHANGED 1)
-  ENDIF(QT_QMAKE_EXECUTABLE_LAST AND NOT QT_QMAKE_EXECUTABLE_LAST MATCHES "^${QT_QMAKE_EXECUTABLE}$")
+  IF(QT_QMAKE_EXECUTABLE_LAST)
+    STRING(COMPARE NOTEQUAL "${QT_QMAKE_EXECUTABLE_LAST}" "${QT_QMAKE_EXECUTABLE}" QT_QMAKE_CHANGED)
+  ENDIF(QT_QMAKE_EXECUTABLE_LAST)
 
   SET(QT_QMAKE_EXECUTABLE_LAST "${QT_QMAKE_EXECUTABLE}" CACHE INTERNAL "" FORCE)