Suppress compiler warnings for non-sensical unit conversions

src/units.w

 
 @(units.cpp@>=
 #include "units.h"
+#include <QtDebug>
 
 @ The |isTemperatureUnit()| method may seem counter-intuitive while the enum
 only contains represenations of temperature measurements, but there are plans
 					break;
 				case Rankine:@/
 					return value + 459.67;
+					break;
+				default:@/
+					qDebug() << "Warning: Non-sensical unit conversion.";
 					break;@t\2@>@/
 			}@/
 			break;
 					break;
 				case Rankine:@/
 					return (value + 273.15) * 9.0 / 5.0;
+					break;
+				default:@/
+					qDebug() << "Warning: Non-sensical unit conversion.";
 					break;@t\2@>@/
 			}@/
 			break;
 					break;
 				case Rankine:@/
 					return value * 9.0 / 5.0;
+					break;
+				default:@/
+					qDebug() << "Warning: Non-sensical unit conversion.";
 					break;@t\2@>@/
 			}@/
 			break;
 					break;
 				case Rankine:@/
 					return value;
+					break;
+				default:@/
+					qDebug() << "Warning: Non-sensical unit conversion.";
 					break;@t\2@>@/
 			}@/
 			break;