Set scale to be 5 for bc lat/lon converisons

scripts/core/sxmo_gpsutil.sh

@@ -11,6 +11,7 @@ CPI=3.14159265358979323846
 lat2px() {
 	DEGREES="$1"; ZOOM="$2"
 	echo "
+		scale=5;
 		define atanh(x) { return((l(1 + x) - l(1 - x))/2) };
 		-( \
 			atanh(s(($DEGREES * $CPI / 180))) * \
@@ -21,6 +22,7 @@ lat2px() {
 lon2px() {
 	DEGREES="$1"; ZOOM="$2"
 	echo "
+		scale=5;
 		( \
 			($DEGREES * $CPI / 180) * $CTILESIZE *  \
 			e($ZOOM * $CLN2) / (2 * $CPI) \
@@ -30,6 +32,7 @@ lon2px() {
 px2lat() {
 	PX="$1"; ZOOM="$2"
 	echo "
+		scale=5;
 		define asin(x) {
 			if(x==1) return($CPI/2); if(x==-1) return(-$CPI/2); return(a(x/sqrt(1-(x^2))));
 		}
@@ -43,6 +46,7 @@ px2lat() {
 px2lon() {
 	PX="$1"; ZOOM="$2"
 	echo "
+		scale=5;
 		( \
 			($PX - (e($ZOOM * $CLN2) * ($CTILESIZE / 2))) * 2 * $CPI / \
 			($CTILESIZE * e($ZOOM * $CLN2)) \