Fix dangerous parser use

Jean-Marc discovered a possible data loss caused by Parser::getChar().
This is now fixed, and Parser::getChar() is removed, since it is no longer
needed and easy to use it in the wrong way.

src/tex2lyx/Parser.cpp

@@ -413,14 +413,6 @@ bool Parser::good()
 }
 
 
-char Parser::getChar()
-{
-	if (!good())
-		error("The input stream is not well...");
-	return get_token().character();
-}
-
-
 bool Parser::hasOpt()
 {
 	// An optional argument can occur in any of the following forms:

src/tex2lyx/Parser.h

@@ -282,11 +282,6 @@ public:
 	std::string verbatim_item();
 	///
 	std::string verbatimOption();
-	/*!
-	 * Returns the character of the current token and increments
-	 * the token position.
-	 */
-	char getChar();
 	///
 	void error(std::string const & msg);
 	/// The previous token.

src/tex2lyx/text.cpp

@@ -2105,10 +2105,10 @@ void parse_macro(Parser & p, ostream & os, Context & context)
 
 			// followed by number?
 			if (p.next_token().cat() == catOther) {
-				char c = p.getChar();
-				paramtext += c;
+				string s = p.get_token().asInput();
+				paramtext += s;
 				// number = current arity + 1?
-				if (c == arity + '0' + 1)
+				if (s.size() == 1 && s[0] == arity + '0' + 1)
 					++arity;
 				else
 					simple = false;