Merge pull request #1881 from nicolasfella/envempty

Use qEnvironmentVariableIsEmpty

src/common/checksums.cpp

@@ -150,7 +150,7 @@ QByteArray contentChecksumType()
 
 static bool checksumComputationEnabled()
 {
-    static bool enabled = qgetenv("OWNCLOUD_DISABLE_CHECKSUM_COMPUTATIONS").isEmpty();
+    static bool enabled = qEnvironmentVariableIsEmpty("OWNCLOUD_DISABLE_CHECKSUM_COMPUTATIONS");
     return enabled;
 }