ffGetFileContent now uses FFstrbuf for preventing buffer overflows

src/modules/gpu.c

@@ -11,8 +11,7 @@ static void handleGPU(FFinstance* instance, struct pci_access* pacc, struct pci_
     if(ffPrintCachedValue(instance, key))
         return;
 
-    FFstrbuf gpu;
-    ffStrbufInit(&gpu);
+    FF_STRBUF_CREATE(gpu);
 
     char vendor[512];
     ffpci_lookup_name(pacc, vendor, sizeof(vendor), PCI_LOOKUP_VENDOR, dev->vendor_id, dev->device_id);