Add lib64 to library search paths

This is related to Bug 1016

configure

@@ -60,7 +60,7 @@ if [ -z "$QTDIR" ]; then
 	if [ "$QC_DEBUG" = "Y" ]; then
 		echo \$QTDIR not set... trying to find Qt manually
 	fi
-	for p in /usr/lib/tqt /usr/share/tqt /usr/share/tqt3 /usr/local/lib/tqt /usr/local/share/tqt /usr/lib/tqt3 /usr/local/lib/tqt3 /usr/lib/qt /usr/share/qt /usr/share/qt3 /usr/local/lib/qt /usr/local/share/qt /usr/lib/qt3 /usr/local/lib/qt3 /usr/X11R6/share/qt /usr/qt/3 ; do
+	for p in /usr/lib/tqt /usr/share/tqt /usr/share/tqt3 /usr/local/lib/tqt /usr/local/share/tqt /usr/lib/tqt3 /usr/local/lib/tqt3 /usr/lib/qt /usr/share/qt /usr/share/qt3 /usr/local/lib/qt /usr/local/share/qt /usr/lib/qt3 /usr/local/lib/qt3 /usr/lib64/tqt /usr/local/lib64/tqt /usr/lib64/tqt3 /usr/local/lib64/tqt3 /usr/lib64/qt /usr/local/lib64/qt /usr/lib64/qt3 /usr/local/lib64/qt3 /usr/X11R6/share/qt /usr/qt/3 ; do
 		if [ -d "$p/mkspecs" ]; then
 			QTDIR=$p
 			break;
@@ -394,6 +394,10 @@ public:
 			*lib = "/usr/local/lib";
 			return true;
 		}
+		if(checkLibrary("/usr/local/lib64", name)) {
+			*lib = "/usr/local/lib64";
+			return true;
+		}
 		return false;
 	}
 
@@ -539,9 +543,12 @@ if [ "$?" != "0" ]; then
 	echo "There was an error compiling 'conf'.  Be sure you have a proper"
 	echo "TQt 3.x Multithreaded (MT) build environment set up."
 	if [ ! -f "$QTDIR/lib/libtqt-mt.so.3" ]; then
-		echo
-		echo "One possible reason is that you don't have"
-		echo "libtqt-mt.so.3 installed in $QTDIR/lib/."
+		if [ ! -f "$QTDIR/lib64/libtqt-mt.so.3" ]; then
+			echo
+			echo "One possible reason is that you don't have"
+			echo "libtqt-mt.so.3 installed in $QTDIR/lib/"
+			echo "or $QTDIR/lib64/."
+		fi
 	fi
 	echo
 	exit 1;