Require spaces around equality comparisons

Commit a1cbe4b5 added a check for spaces around assignments and this
patch extends it to checks for spaces around '=='.  One exception is
virAssertCmpInt where comma after '==' is acceptable (since it is a
macro and '==' is its argument).

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>

tests/xml2sexprtest.c

@@ -185,7 +185,7 @@ mymain(void)
     virObjectUnref(caps);
     virObjectUnref(xmlopt);
 
-    return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE;
+    return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
 VIRT_TEST_MAIN(mymain)