CENTERSTICKS filter to guarantee that stick center is always stick center. Not 0.1, 0.2 etc.. always 0.

src/opentx.cpp

@@ -2267,7 +2267,7 @@ BeepANACenter evalSticks(uint8_t mode)
 
     if (g_model.throttleReversed && ch==THR_STICK)
       v = -v;
-      
+
 
 #if defined(EXTRA_3POS)
     if (i == POT1+EXTRA_3POS-1) {
@@ -2315,6 +2315,15 @@ BeepANACenter evalSticks(uint8_t mode)
         v = (int32_t(v)*calc100toRESX(g_model.swashR.value))/int32_t(d);
 #endif
 
+#if defined(CENTERSTICKS)
+	if(ch==THR_STICK || ch == ELE_STICK || ch == RUD_STICK || ch == AIL_STICK){
+		uint8_t stmp = (uint16_t)abs(v) / 16;
+		if(stmp <= 0.1 && stmp >= -0.1){
+			v = 0;	
+		}
+	}	
+#endif   
+
       rawAnas[ch] = v;
       anas[ch] = v; //set values for mixer
     }