added default clause to the switch statement. This fixes a memory corruption bug in case the caller supplied an invalid value. Now we use B_TRUNCATE_MIDDLE in that case. Found by Andrea Anzani

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21564 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kits/interface/InterfaceDefs.cpp

@@ -1319,6 +1319,7 @@ truncate_string(const char* string, uint32 mode, float width,
 			// TODO: implement, though it was never implemented on R5
 			// FALL THROUGH (at least do something)
 		case B_TRUNCATE_MIDDLE:
+		default:
 			truncated = truncate_middle(source, dest, numChars, escapementArray,
 				width, ellipsisWidth, fontSize);
 			break;