Fix -Wmaybe-uninitialized warnings

samples/Jzon.cpp

@@ -917,7 +917,7 @@ namespace Jzon
 
 	void Parser::tokenize()
 	{
-		Token token;
+		Token token = T_UNKNOWN;
 		std::string valueBuffer;
 		bool saveBuffer;
 

xmpsdk/src/XMPUtils-FileInfo.cpp

@@ -783,7 +783,7 @@ XMPUtils::CatenateArrayItems ( const XMPMeta & xmpObj,
 	XMP_Assert ( (schemaNS != 0) && (arrayName != 0) ); // ! Enforced by wrapper.
 	XMP_Assert ( (separator != 0) && (quotes != 0) && (catedStr != 0) && (catedLen != 0) ); // ! Enforced by wrapper.
 	
-	size_t		 strLen, strPos, charLen;
+	size_t		 strLen=0, strPos=0, charLen=0;
 	UniCharKind	 charKind;
 	UniCodePoint currUCP, openQuote, closeQuote;