Minor typo fixes.

base/src/org/compiere/model/MBPartner.java

@@ -282,7 +282,7 @@ public class MBPartner extends X_C_BPartner
 	}	//	MBPartner
 
 	/**
-	 * 	Import Contstructor
+	 * 	Import Constructor
 	 *	@param impBP import
 	 */
 	public MBPartner (X_I_BPartner impBP)

base/src/org/compiere/model/ModelValidator.java

@@ -161,7 +161,7 @@ public interface ModelValidator
 	 *	@param po persistent object
 	 *	@param timing see TIMING_ constants
      *	@return error message or null - 
-     *	if not null, the pocument will be marked as Invalid.
+     *	if not null, the document will be marked as Invalid.
 	 */
 	public String docValidate (PO po, int timing);