fix typo found by Milan Cutka <cutka@szm.sk>

git-svn-id: file:///var/local/repositories/mplayer/trunk/postproc@5577 b3059339-0415-0410-9bf9-f77b7e298cf2

postprocess.h

@@ -116,7 +116,7 @@ void postprocess2(unsigned char * src[], int src_stride,
 int getPpModeForQuality(int quality);
 
 // name is the stuff after "-pp" on the command line
-struct PPMode getPpModeByNameAndQuality(char *name, int quality);
+struct PPMode getPPModeByNameAndQuality(char *name, int quality);
 
 int readPPOpt(void *conf, char *arg);