Make "--with-qtdir" work better in ./configure.

Previously if your --with-qtdir was not in your PATH, ./configure would pick up the uic that was in your path anyway.  Now uic and rcc are forced to those found inside whatever you specify with --with-qtdir.
-This line, and those below, will be ignored--

M    qgis/acinclude.m4


git-svn-id: http://svn.osgeo.org/qgis/trunk@4719 c8812cc2-4d05-0410-92ff-de0c093fc19c

acinclude.m4

@@ -250,13 +250,13 @@ if test $QT_MAJOR = "4" ; then
       fi
   fi
 
-  # uic3 is the Qt user interface compiler in Qt3 legacy mode
-  AC_PATH_PROG(UIC, uic, , [$PATH:$QTDIR/bin])
+  # uic is the Qt user interface compiler
+  AC_CHECK_PROG(UIC, uic, $QTDIR/bin/uic, , $QTDIR/bin)
   if test x$UIC = x ; then
     AC_MSG_ERROR([*** uic must be in path])
   fi
   # check for rcc
-  AC_PATH_PROG(RCC, rcc, , [$PATH:$QTDIR/bin])
+  AC_CHECK_PROG(RCC, rcc, $QTDIR/bin/rcc, , $QTDIR/bin)
   if test x$RCC = x ; then
     AC_MSG_ERROR([*** rcc must be in path])
   fi