[Var] vorbis: Silence GCC false-positive warning.

git-svn-id: https://source.openmpt.org/svn/openmpt/trunk/OpenMPT@20682 56274372-70c3-4bfc-bfc3-4c3a0b034d27

include/vorbis/OpenMPT.txt

@@ -4,6 +4,7 @@ The following changes have been made:
   symbian, test, vq) have been removed.
 - https://github.com/xiph/vorbis/pull/100 and
   https://github.com/xiph/vorbis/pull/101 have been applied.
+- A GCC warning in lib/lpc.c has been silenced.
 - All modifications have been marked with /* OpenMPT */.
 - For building, premake is used to generate Visual Studio project files.
   See ../build/premake/ for details.

include/vorbis/lib/lpc.c

@@ -75,7 +75,14 @@ float vorbis_lpc_from_data(float *data,float *lpci,int n,int m){
   /* Generate lpc coefficients from autocorr values */
 
   /* set our noise floor to about -100dB */
+#if defined(__GNUC__) && !defined(__clang__) && !defined(_MSC_VER)  /* OpenMPT */
+#pragma GCC diagnostic push  /* OpenMPT */
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"  /* OpenMPT */
+#endif  /* OpenMPT */
   error=aut[0] * (1. + 1e-10);
+#if defined(__GNUC__) && !defined(__clang__) && !defined(_MSC_VER)  /* OpenMPT */
+#pragma GCC diagnostic pop  /* OpenMPT */
+#endif  /* OpenMPT */
   epsilon=1e-9*aut[0]+1e-10;
 
   for(i=0;i<m;i++){