More optimization repair; referenced string[0] instead of string[i]

Sources/Plasma/PubUtilLib/plGImage/plFont.cpp

@@ -468,7 +468,7 @@ void	plFont::IRenderString( plMipmap *mip, UInt16 x, UInt16 y, const wchar_t *st
 				// handle invalid chars discretely
 				plCharacter* charToDraw = &(fCharacters[(UInt16)L' ' - fFirstChar]);
 				if (fCharacters.Count() <= ((UInt16)string[i] - fFirstChar)) {
-					UInt16 w = wctob(string[0]);
+					UInt16 w = wctob(string[i]);
 					if (w != EOF && (w - fFirstChar) <= fCharacters.Count())
 						charToDraw = &(fCharacters[w - fFirstChar]);
 				} else {