Fix InitData classes to init themselves properly to avoid latent unitialized memory bugs

git-svn-id: svn://10.0.0.236/trunk@13272 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/widget/public/nsIComboBox.h

@@ -32,6 +32,11 @@
  */
 
 struct nsComboBoxInitData : public nsWidgetInitData {
+  nsComboBoxInitData()
+    : mDropDownHeight(0)
+  {
+  }
+
   PRUint32 mDropDownHeight; // in pixels
 };
 

mozilla/widget/public/nsILabel.h

@@ -38,6 +38,11 @@ enum nsLabelAlignment {
   }; 
 
 struct nsLabelInitData : public nsWidgetInitData {
+  nsLabelInitData()
+    : mAlignment(eAlign_Left)
+  {
+  }
+
   nsLabelAlignment mAlignment;
 };
 

mozilla/widget/public/nsIListBox.h

@@ -32,6 +32,11 @@
  */
 
 struct nsListBoxInitData : public nsWidgetInitData {
+  nsListBoxInitData()
+    : mMultiSelect(PR_FALSE)
+  {
+  }
+
   PRBool mMultiSelect;
 };
 

mozilla/widget/public/nsITextWidget.h

@@ -27,6 +27,12 @@
 
 
 struct nsTextWidgetInitData : public nsWidgetInitData {
+  nsTextWidgetInitData()
+    : mIsPassword(PR_FALSE),
+      mIsReadOnly(PR_FALSE)
+  {
+  }
+
   PRBool mIsPassword;
   PRBool mIsReadOnly;
 };

mozilla/widget/public/nsIWidget.h

@@ -116,7 +116,13 @@ enum nsCursor {   ///(normal cursor,       usually rendered as an arrow)
  */
 
 struct nsWidgetInitData {
-  PRPackedBool  clipChildren;  // when painting exclude area occupied by child windows
+  nsWidgetInitData()
+    : clipChildren(PR_FALSE)
+  {
+  }
+
+  // when painting exclude area occupied by child windows
+  PRPackedBool  clipChildren;
 };
 
 /**