some never read compil warning fixes

src/driver/audiodec/ffmpegdec.cpp

@@ -297,7 +297,6 @@ CBaseDec::RetCode CFfmpegDec::Decoder(FILE *_in, int /*OutputFd*/, State* state,
 					seek_flags = 0;
 				}
 				av_seek_frame(avc, best_stream, pts, seek_flags);
-				skip = 0;
 				// if a custom value was set we only jump once
 				if (actSecsToSkip != 0) {
 					*state=PLAY;

src/driver/fontrenderer.cpp

@@ -365,7 +365,6 @@ int UTF8ToUnicode(const char * &text, const bool utf8_encoded) // returns -1 on
 			text++;
 			if (((*text) & 0xc0) != 0x80)
 			{
-				remaining_unicode_length = -1;
 				return -1;          // incomplete or corrupted character
 			}
 			unicode_value <<= 6;