[qt5] Use Qt5OpenGL when globe is built

Resolves #1940

Author: m-kuhn

src/plugins/globe/CMakeLists.txt

@@ -4,6 +4,9 @@ SET(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules ${CMAKE_MODULE_PA
 FIND_PACKAGE(OSG REQUIRED)
 FIND_PACKAGE(OSGEARTH REQUIRED)
 FIND_PACKAGE(Threads)
+IF(QT5_BUILD)
+  FIND_PACKAGE(Qt5OpenGL REQUIRED)
+ENDIF(QT5_BUILD)
 
 IF(HAVE_OSGEARTH_CHILD_SPACING)
   ADD_DEFINITIONS(-DHAVE_OSGEARTH_CHILD_SPACING)