[libgda] GdaJValue: Fix build now that GdaTime is an opaque type.

[Murray Cumming <murrayc src gnome org>]

commit c96eee8577135f99901ae65545c6ac689239d260
Author: Murray Cumming <murrayc murrayc com>
Date:   Sun Oct 29 21:43:10 2017 +0100

    GdaJValue: Fix build now that GdaTime is an opaque type.
    
    This was the first warning:
    
    GdaJValue.c|226 col 16| error: invalid application of ‘sizeof’ to incomplete type ‘GdaTime {aka     
struct _GdaTime}’
    ||   tim = g_new0 (GdaTime, 1);

 providers/jdbc/GdaJValue.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)
---
diff --git a/providers/jdbc/GdaJValue.c b/providers/jdbc/GdaJValue.c
index cb06b26..c4e9b31 100644
--- a/providers/jdbc/GdaJValue.c
+++ b/providers/jdbc/GdaJValue.c
@@ -223,10 +223,7 @@ JNICALL Java_GdaJValue_setCTime (G_GNUC_UNUSED JNIEnv *jenv, G_GNUC_UNUSED jobje
        GdaTime *tim;
        GValue *value;
 
-       tim = g_new0 (GdaTime, 1);
-       tim->hour = hour;
-       tim->minute = min;
-       tim->second = sec;
+       tim = gda_time_new_from_values (hour, min, sec, 0, 0);
 
        value = gda_row_get_value (GDA_ROW (jni_jlong_to_cpointer (c_pointer)), col);
        gda_value_reset_with_type (value, GDA_TYPE_TIME);
@@ -251,8 +248,8 @@ JNICALL Java_GdaJValue_getCTime (JNIEnv *jenv, jobject obj, jlong c_pointer)
                return NULL;
        }
 
-       jobj = (*jenv)->CallObjectMethod (jenv, obj, GdaJValue__createTime->mid, 
-                                         tim->hour, tim->minute, tim->second);
+       jobj = (*jenv)->CallObjectMethod (jenv, obj, GdaJValue__createTime->mid,
+                                         gda_time_get_hour (tim), gda_time_get_minute (tim), 
gda_time_get_second (tim));
        if ((*jenv)->ExceptionCheck (jenv))
                return NULL;
        else