Update CMakeLists.txt

Author: ferdymercury

builtins/ftgl/CMakeLists.txt

@@ -15,7 +15,7 @@ set(ROOT_FTGL_PATCH_FILE_2 "${CMAKE_CURRENT_SOURCE_DIR}/0002-fix-type-error.patc
 set(ROOT_FTGL_PREFIX ${CMAKE_BINARY_DIR}/builtins/FTGL-prefix)
 set(ROOT_FTGL_LIBRARY ${ROOT_FTGL_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}ftgl${CMAKE_STATIC_LIBRARY_SUFFIX})
 
-if (NOT DEFINED GIT_EXECUTABLE OR ${GIT_EXECUTABLE} STREQUAL "")
+if (NOT DEFINED GIT_EXECUTABLE)
   set(GIT_EXECUTABLE "git")
 endif()