OS X compile fixes

include/openspace/abuffer/abufferframebuffer.h

@@ -40,7 +40,7 @@ public:
     virtual void preRender();
     virtual void postRender();
     
-    virtual std::string settings();
+    std::vector<fragmentData> pixelData();
 protected:
     virtual bool reinitializeInternal();
     

src/abuffer/abufferframebuffer.cpp

@@ -60,8 +60,8 @@ void ABufferFramebuffer::postRender() {
 
 }
 
-std::string ABufferFramebuffer::settings() {
-	return R"()";
+std::vector<ABuffer::fragmentData> ABufferFramebuffer::pixelData() {
+    return std::vector<ABuffer::fragmentData>();
 }
 
 

src/engine/openspaceengine.cpp

@@ -222,6 +222,10 @@ void OpenSpaceEngine::loadFonts() {
 		std::string font;
 		fonts.getValue(key, font);
 		font = absPath(font);
+        if(!FileSys.fileExists(font)) {
+            LERROR("Could not find font '" << font << "'");
+            continue;
+        }
 
 		LINFO("Registering font '" << font << "' with key '" << key << "'");
 		sgct_text::FontManager::instance()->addFont(key, font, local);