Fix Metar Decoding / Wind check for Wind Chill (#1072)

* Fix Metar Decoding / Wind check for Wind Chill

PR aims to fix the bug #1071 by checking both the wind speed and it's value for starting Wind Chill calculation.

tests/MetarTest.php

@@ -151,6 +151,19 @@ class MetarTest extends TestCase
         $this->assertEquals('Few at 1500 feet; few at 25000 feet', $metar['clouds_report_ft']);
     }
 
+    /**
+     * https://github.com/nabeelio/phpvms/issues/1071
+     */
+    public function testMetarWindSpeedChill()
+    {
+        $metar = 'EKYT 091020Z /////KT CAVOK 02/M03 Q1019';
+        $metar = Metar::parse($metar);
+
+        $this->assertEquals('VFR', $metar['category']);
+        $this->assertNull($metar['wind_speed']);
+        $this->assertEquals(6.21, $metar['visibility']['mi']);
+    }
+
     /**
      * Visibility in KM not parsed
      *