configure: Always warn on missing GStreamer if --with-gstreamer was specified.

configure

@@ -14708,7 +14708,9 @@ fi
 CPPFLAGS=$ac_save_CPPFLAGS
 
 fi
-if test "x$ac_glib2_broken" != xyes -a "x$ac_cv_lib_gstreamer_1_0_gst_pad_new" != xyes -a "x$ac_cv_header_QuickTime_ImageCompression_h" != xyes ; then :
+if test "x$with_gstreamer" = xyes -o "x$ac_cv_header_QuickTime_ImageCompression_h" != xyes
+then
+    if test "x$ac_glib2_broken" != xyes -a "x$ac_cv_lib_gstreamer_1_0_gst_pad_new" != xyes; then :
   case "x$with_gstreamer" in
   x)   as_fn_append wine_notices "|gstreamer-1.0 base plugins ${notice_platform}development files not found, GStreamer won't be supported." ;;
   xno) ;;
@@ -14717,6 +14719,7 @@ This is an error since --with-gstreamer was requested." "$LINENO" 5 ;;
 esac
 
 fi
+fi
 test "x$ac_cv_lib_gstreamer_1_0_gst_pad_new" = xyes || enable_winegstreamer=${enable_winegstreamer:-no}
 
 ALSA_LIBS=""

configure.ac

@@ -1622,8 +1622,11 @@ then
                  ac_glib2_broken=yes
                  WINE_NOTICE([glib-2.0 pkgconfig configuration is for the wrong architecture, winegstreamer won't be built.])])])])
 fi
-WINE_NOTICE_WITH(gstreamer,[test "x$ac_glib2_broken" != xyes -a "x$ac_cv_lib_gstreamer_1_0_gst_pad_new" != xyes -a "x$ac_cv_header_QuickTime_ImageCompression_h" != xyes ],
-                 [gstreamer-1.0 base plugins ${notice_platform}development files not found, GStreamer won't be supported.])
+if test "x$with_gstreamer" = xyes -o "x$ac_cv_header_QuickTime_ImageCompression_h" != xyes
+then
+    WINE_NOTICE_WITH(gstreamer,[test "x$ac_glib2_broken" != xyes -a "x$ac_cv_lib_gstreamer_1_0_gst_pad_new" != xyes],
+                     [gstreamer-1.0 base plugins ${notice_platform}development files not found, GStreamer won't be supported.])
+fi
 test "x$ac_cv_lib_gstreamer_1_0_gst_pad_new" = xyes || enable_winegstreamer=${enable_winegstreamer:-no}
 
 dnl **** Check for ALSA 1.x ****