ENH: add qtmain to findqt

Modules/FindQt4.cmake

@@ -568,6 +568,12 @@ IF (QT4_QMAKE_FOUND)
   FIND_LIBRARY(QT_QTDESIGNER_LIBRARY_RELEASE NAMES QtDesigner QtDesigner4 PATHS ${QT_LIBRARY_DIR}        NO_DEFAULT_PATH)
   FIND_LIBRARY(QT_QTDESIGNER_LIBRARY_DEBUG   NAMES QtDesigner_debug QtDesignerd4 PATHS ${QT_LIBRARY_DIR} NO_DEFAULT_PATH)
 
+  # Set QT_QTMAIN_LIBRARY
+  IF(WIN32)
+    FIND_LIBRARY(QT_QTMAIN_LIBRARY_RELEASE NAMES qtmain PATHS ${QT_LIBRARY_DIR} NO_DEFAULT_PATH)
+    FIND_LIBRARY(QT_QTMAIN_LIBRARY_DEBUG   NAMES qtmaind PATHS ${QT_LIBRARY_DIR} NO_DEFAULT_PATH)
+  ENDIF(WIN32)
+
   ############################################
   #
   # Check the existence of the libraries.