Re #11422 Compatibility for Qwt <v5.2.0

Code/Mantid/MantidPlot/src/qwt_compat.h

@@ -13,6 +13,11 @@
 #   define hBound() upperBound()
 #   define loMargin() lowerMargin()
 #   define hiMargin() upperMargin()
+#else
+#   define lowerBound()   lBound()
+#   define upperBound()   hBound()
+#   define lowerMargin()  loMargin()
+#   define upperMargin()  hiMargin()
 #endif /* QWT_VERSION >= 0x050200 */
 
 #endif /* MANTID_QWT_COMPAT */