SDL_mixer: cmake: fix vendored libmodplug not installing correctly. (0ee72)

From 0ee7281ea41a43568768afa26d672b0fa07aeb42 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 10 Jul 2022 02:50:01 +0300
Subject: [PATCH] cmake: fix vendored libmodplug not installing correctly.

copy+paste fix authored by Austin Hurst.
Fixes https://github.com/libsdl-org/SDL_mixer/issues/420
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1773c4d4..e5b47116 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -550,7 +550,7 @@ if(SDL2MIXER_MOD_MODPLUG)
             # <modplug.h> is not escaped properly for windres when using MinGW + "Unix Makefiles" ==> limit it to C sources
             target_compile_definitions(SDL2_mixer PRIVATE $<$<COMPILE_LANGUAGE:C>:MODPLUG_HEADER=<modplug.h$<ANGLE-R>>)
         endif()
-        if(SDL2MIXER_FLAC_LIBFLAC_SHARED OR NOT SDL2MIXER_BUILD_SHARED_LIBS)
+        if(SDL2MIXER_MOD_MODPLUG_SHARED OR NOT SDL2MIXER_BUILD_SHARED_LIBS)
             list(APPEND INSTALL_EXTRA_TARGETS modplug)
         endif()
         if(NOT SDL2MIXER_MOD_MODPLUG_SHARED)