imagemagick: fix CONFIG_SCRIPTS handling when C++ isn't available

Fixes http://autobuild.buildroot.org/results/0b35567af8a41a14c9c33f3be5299978c5847e03

Magick++-config only gets installed when C++ support is detected.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/imagemagick/imagemagick.mk

@@ -17,7 +17,11 @@ IMAGEMAGICK_LICENSE_FILES = LICENSE
 IMAGEMAGICK_INSTALL_STAGING = YES
 IMAGEMAGICK_AUTORECONF = YES
 IMAGEMAGICK_CONFIG_SCRIPTS = \
-	$(addsuffix -config,Magick MagickCore MagickWand Wand Magick++)
+	$(addsuffix -config,Magick MagickCore MagickWand Wand)
+
+ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
+IMAGEMAGICK_CONFIG_SCRIPTS += Magick++-config
+endif
 
 ifeq ($(BR2_LARGEFILE),y)
 IMAGEMAGICK_CONF_ENV = ac_cv_sys_file_offset_bits=64