Bugfix for fatal error in extractGPSCoordinate

Added a test file that causes an error in Mapper\\Native::extractGPSCoordinate.
Added a fix for this error.

Author: Christoph Singer

lib/PHPExif/Mapper/Native.php

@@ -249,11 +249,14 @@ protected function isFieldKnown(&$field)
     /**
      * Extract GPS coordinates from components array
      *
-     * @param array $components
+     * @param array|string $components
      * @return float
      */
-    protected function extractGPSCoordinate(array $components)
+    protected function extractGPSCoordinate($components)
     {
+        if (!is_array($components)) {
+            $components = array($components);
+        }
         $components = array_map(array($this, 'normalizeComponent'), $components);
 
         if (count($components) > 2) {

tests/PHPExif/ExifTest.php

@@ -611,7 +611,8 @@ public function testAdapterConsistency()
         $methods = $reflClass->getMethods(ReflectionMethod::IS_PUBLIC);
         $testfiles = array(
             PHPEXIF_TEST_ROOT . '/files/morning_glory_pool_500.jpg',
-            PHPEXIF_TEST_ROOT . '/files/dsc_5794.jpg'
+            PHPEXIF_TEST_ROOT . '/files/dsc_5794.jpg',
+            PHPEXIF_TEST_ROOT . '/files/dsc_0003.jpg'
         );
 
         $adapter_exiftool = new \PHPExif\Adapter\Exiftool();