DEV-18513 - Don't fail if we have no debug FMOD libraries

Reviewed by Poppy.

indra/cmake/FMOD.cmake

 # -*- cmake -*-
 
+include(Linking)
+
 if(INSTALL_PROPRIETARY)
   include(Prebuilt)
   use_prebuilt_binary(fmod)
@@ -9,22 +11,21 @@ find_library(FMOD_LIBRARY_RELEASE
              NAMES fmod fmodvc fmod-3.75
              PATHS
              ${ARCH_PREBUILT_DIRS_RELEASE}
-             ${LIBS_PREBUILT_DIR}/${LL_ARCH_DIR}/lib/release
-             ${LIBS_PREBUILT_DIR}/${LL_ARCH_DIR}/lib_release
-             ${LIBS_PREBUILT_DIR}/${LL_ARCH_DIR}/lib_release_client
              )
 
 find_library(FMOD_LIBRARY_DEBUG
              NAMES fmod fmodvc fmod-3.75
              PATHS
              ${ARCH_PREBUILT_DIRS_DEBUG}
-             ${LIBS_PREBUILT_DIR}/${LL_ARCH_DIR}/lib/debug
-             ${LIBS_PREBUILT_DIR}/${LL_ARCH_DIR}/lib_debug
              )
 
-if(FMOD_LIBRARY_RELEASE AND FMOD_LIBRARY_DEBUG)
-  set(FMOD_LIBRARY debug ${FMOD_LIBRARY_DEBUG} optimized ${FMOD_LIBRARY_RELEASE})
-endif(FMOD_LIBRARY_RELEASE AND FMOD_LIBRARY_DEBUG)
+if (FMOD_LIBRARY_RELEASE AND FMOD_LIBRARY_DEBUG)
+  set(FMOD_LIBRARY
+      debug ${FMOD_LIBRARY_DEBUG}
+      optimized ${FMOD_LIBRARY_RELEASE})
+elseif (FMOD_LIBRARY_RELEASE)
+  set(FMOD_LIBRARY ${FMOD_LIBRARY_RELEASE})
+endif (FMOD_LIBRARY_RELEASE AND FMOD_LIBRARY_DEBUG)
 
 if (NOT FMOD_LIBRARY)
   set(FMOD_SDK_DIR CACHE PATH "Path to the FMOD SDK.")