lpc: always initialize ref and err

CC: libav-stable@libav.org
Bug-Id: CID 29585 / CID 700759

libavcodec/lpc.c

@@ -174,7 +174,7 @@ int ff_lpc_calc_coefs(LPCContext *s,
                       int omethod, int max_shift, int zero_shift)
 {
     double autoc[MAX_LPC_ORDER+1];
-    double ref[MAX_LPC_ORDER];
+    double ref[MAX_LPC_ORDER] = { 0 };
     double lpc[MAX_LPC_ORDER][MAX_LPC_ORDER];
     int i, j, pass = 0;
     int opt_order;

libavcodec/lpc.h

@@ -152,7 +152,7 @@ static inline int compute_lpc_coefs(const LPC_TYPE *autoc, int max_order,
                                     int normalize)
 {
     int i, j;
-    LPC_TYPE err;
+    LPC_TYPE err = { 0 };
     LPC_TYPE *lpc_last = lpc;
 
     if (normalize)