update default param value of `j()`.

src/functions.cc

@@ -27,7 +27,7 @@ namespace php_arma
 
     PHP_FUNCTION(j)
     {
-        double imag = 0.;
+        double imag = 1.;
         ZEND_PARSE_PARAMETERS_START(0, 1)
             Z_PARAM_OPTIONAL
             Z_PARAM_DOUBLE(imag)

stubs/functions.php

@@ -17,7 +17,7 @@ function cx_double($real = 0., $imag = 0.) {}
  * @param double $imag[optional]
  * @return CxDouble
  */
-function j($imag = 0.) {}
+function j($imag = 1.) {}
 
 /**
  * Change the RNG seed (used within the php-armadillo extension).