Keep PHPStan happy

Author: vmcj

webapp/src/Utils/Utils.php

@@ -400,14 +400,13 @@ public static function blendAlphaBackground(array $rgba, string $bg): array
     {
         if (count($rgba) === 3) {
             return $rgba;
-	} elseif (count($rgba) === 4) {
-	    $result = [];
-            $bg = static::parseHexColor($bg);
-            for ($i=0; $i<3; $i++) {
-                $result[] = $rgba[$i] * $rgba[3] + $bg[$i] * (1 - $rgba[3]);
-            }
-	    return $result;
-	}
+	} 
+	$result = [];
+        $bg = static::parseHexColor($bg);
+        for ($i=0; $i<3; $i++) {
+            $result[] = $rgba[$i] * $rgba[3] + $bg[$i] * (1 - $rgba[3]);
+        }
+	return $result;
     }
 
     public static function relativeLuminance(string $hexRGB, string $rgb_background = "#fff"): float