Fix SDL2_mixer file names to actually find the files

Author: janisozaur

FindSDL2_mixer.cmake

@@ -42,7 +42,7 @@
 # (To distribute this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
-find_path(SDL2_MIXER_INCLUDE_DIR SDL_MIXER.h
+find_path(SDL2_MIXER_INCLUDE_DIR SDL_mixer.h
         HINTS
         ENV SDL2MIXERDIR
         ENV SDL2DIR
@@ -59,18 +59,18 @@ else()
 endif()
 
 find_library(SDL2_MIXER_LIBRARY
-        NAMES SDL2_MIXER
+        NAMES SDL2_mixer
         HINTS
         ENV SDL2MIXERDIR
         ENV SDL2DIR
-        PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX}
+        PATH_SUFFIXES lib bin ${VC_LIB_PATH_SUFFIX}
         PATHS ${SDL2_MIXER_PATH}
         )
 
 if(SDL2_MIXER_INCLUDE_DIR AND EXISTS "${SDL2_MIXER_INCLUDE_DIR}/SDL_MIXER.h")
-    file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_MIXER.h" SDL2_MIXER_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+[0-9]+$")
-    file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_MIXER.h" SDL2_MIXER_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+[0-9]+$")
-    file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_MIXER.h" SDL2_MIXER_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+[0-9]+$")
+    file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+[0-9]+$")
+    file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+[0-9]+$")
+    file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+[0-9]+$")
     string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MAJOR "${SDL2_MIXER_VERSION_MAJOR_LINE}")
     string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MINOR "${SDL2_MIXER_VERSION_MINOR_LINE}")
     string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_PATCH "${SDL2_MIXER_VERSION_PATCH_LINE}")
@@ -88,7 +88,7 @@ set(SDL2_MIXER_INCLUDE_DIRS ${SDL2_MIXER_INCLUDE_DIR})
 
 include(FindPackageHandleStandardArgs)
 
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_MIXER
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_mixer
         REQUIRED_VARS SDL2_MIXER_LIBRARIES SDL2_MIXER_INCLUDE_DIRS
         VERSION_VAR SDL2_MIXER_VERSION_STRING)