virTestCompareToULL: Rename local variables

The current naming makes it hard for me to see which holds the
expected value and which holds the actual value. Rename them to
make it obvious.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

tests/testutils.c

@@ -822,16 +822,16 @@ int
 virTestCompareToULL(unsigned long long content,
                     unsigned long long src)
 {
-    VIR_AUTOFREE(char *) strcontent = NULL;
-    VIR_AUTOFREE(char *) strsrc = NULL;
+    VIR_AUTOFREE(char *) expectStr = NULL;
+    VIR_AUTOFREE(char *) actualStr = NULL;
 
-    if (virAsprintf(&strcontent, "%llu", content) < 0)
+    if (virAsprintf(&expectStr, "%llu", content) < 0)
         return -1;
 
-    if (virAsprintf(&strsrc, "%llu", src) < 0)
+    if (virAsprintf(&actualStr, "%llu", src) < 0)
         return -1;
 
-    return virTestCompareToString(strcontent, strsrc);
+    return virTestCompareToString(expectStr, actualStr);
 }
 
 /*