A decimal value of 0.0 was treated as a positive number, so it was different from 0

git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@522853 13f79535-47bb-0310-9956-ffa450edef68

src/xercesc/util/XMLBigDecimal.cpp

@@ -301,6 +301,9 @@ void  XMLBigDecimal::parseDecimal(const XMLCh* const toParse
         fractDigits--;
         totalDigits--;
     }
+    // 0.0 got past the check for zero because of the decimal point, so we need to double check it here
+    if(totalDigits==0)
+        sign = 0;
 
     *retPtr = chNull;   //terminated
     return;