coverity#707907 Uninitialized scalar field

Change-Id: Ia3025324ecf4385e90ab31771195f7c3d8574eb9

hwpfilter/source/hwpread.cxx

@@ -460,14 +460,20 @@ bool Picture::Read(HWPFile & hwpf)
     return !hwpf.State();
 }
 
-
 // line(15)
-
-Line::Line():FBox(CH_LINE)
+Line::Line()
+    : FBox(CH_LINE)
+    , dummy(0)
+    , sx(0)
+    , sy(0)
+    , ex(0)
+    , ey(0)
+    , width(0)
+    , shade(0)
+    , color(0)
 {
 }
 
-
 bool Line::Read(HWPFile & hwpf)
 {
     hwpf.Read2b(reserved, 2);