fix PixelGrid leaking memory

Makefile

@@ -11,7 +11,7 @@ OBJECTS = common.o modespec.o gui.o video.o vis.o sync.o pcm.o fsk.o slowrx.o
 all: slowrx
 
 slowrx: $(OBJECTS)
-	$(CC) $(CFLAGS) -o $@ $(OBJECTS) $(GTKLIBS) -lfftw3 -lgthread-2.0 -lasound -lm
+	$(CC) $(CFLAGS) -o $@ $(OBJECTS) $(GTKLIBS) -lfftw3 -lgthread-2.0 -lasound -lm -lpthread
 
 %.o: %.c common.h
 	$(CC) $(CFLAGS) $(GTKCFLAGS) $(OFLAGS) -c -o $@ $<

gui.c

@@ -108,9 +108,9 @@ void setVU (double *Power, int FFTLen, int WinIdx, gboolean ShowWin) {
             pSNR[1] = 0xe4;
             pSNR[2] = 0x84;
         } else {
-          pSNR[0] = 0x00;
-          pSNR[1] = 0x50;
-          pSNR[2] = 0x30;
+          pSNR[0] = 0x20;
+          pSNR[1] = 0x20;
+          pSNR[2] = 0x20;
         }
       } else {
         if (y > 3 && y < H-3 && (W-1-x) % 16 >3 && x % 2 == 0) {
@@ -131,9 +131,9 @@ void setVU (double *Power, int FFTLen, int WinIdx, gboolean ShowWin) {
       pPWR[0] = pPWR[1] = pPWR[2] = 0;
 
       if (logpow > p) {
-        pPWR[0] = clip(pPWR[0] + 0x22 * (logpow-p) / (HiBin-LoBin+1));
-        pPWR[1] = clip(pPWR[1] + 0x66 * (logpow-p) / (HiBin-LoBin+1));
-        pPWR[2] = clip(pPWR[2] + 0x22 * (logpow-p) / (HiBin-LoBin+1));
+        pPWR[0] = 0;//clip(pPWR[0] + 0x22 * (logpow-p) / (HiBin-LoBin+1));
+        pPWR[1] = 192;//clip(pPWR[1] + 0x66 * (logpow-p) / (HiBin-LoBin+1));
+        pPWR[2] = 64;//clip(pPWR[2] + 0x22 * (logpow-p) / (HiBin-LoBin+1));
       }
 
       /*if (ShowWin && LoBin >= GetBin(1200+CurrentPic.HedrShift, FFTLen) &&

video.c

@@ -398,12 +398,16 @@ gboolean GetVideo(guchar Mode, double Rate, int Skip, gboolean Redraw) {
       setVU(Power, FFTLen, WinIdx, TRUE);
     }
 
-    if (Abort) return FALSE;
+    if (Abort) {
+      free(PixelGrid);
+      return FALSE;
+    }
 
     pcm.WindowPtr ++;
 
   }
 
+  free(PixelGrid);
   return TRUE;
 
 }