Coverity: Fix resource leak in nodeinfo.c

Error: RESOURCE_LEAK:
/builddir/build/BUILD/libvirt-0.9.10/src/nodeinfo.c:629: alloc_fn: Calling allocation function "fopen".
/builddir/build/BUILD/libvirt-0.9.10/src/nodeinfo.c:629: var_assign: Assigning: "cpuinfo" =  storage returned from "fopen("/proc/cpuinfo", "r")".
/builddir/build/BUILD/libvirt-0.9.10/src/nodeinfo.c:638: leaked_storage: Variable "cpuinfo" going out of scope leaks the storage it points to.

src/nodeinfo.c

@@ -626,8 +626,8 @@ int nodeGetInfo(virConnectPtr conn ATTRIBUTE_UNUSED, virNodeInfoPtr nodeinfo) {
 
 #ifdef __linux__
     {
-    int ret;
-    char *sysfs_cpuinfo;
+    int ret = -1;
+    char *sysfs_cpuinfo = NULL;
     FILE *cpuinfo = fopen(CPUINFO_PATH, "r");
     if (!cpuinfo) {
         virReportSystemError(errno,
@@ -637,20 +637,19 @@ int nodeGetInfo(virConnectPtr conn ATTRIBUTE_UNUSED, virNodeInfoPtr nodeinfo) {
 
     if (virAsprintf(&sysfs_cpuinfo, CPU_SYS_PATH) < 0) {
         virReportOOMError();
-        return -1;
+        goto cleanup;
     }
 
     ret = linuxNodeInfoCPUPopulate(cpuinfo, sysfs_cpuinfo, nodeinfo);
-    VIR_FORCE_FCLOSE(cpuinfo);
-    if (ret < 0) {
-        VIR_FREE(sysfs_cpuinfo);
-        return -1;
-    }
+    if (ret < 0)
+        goto cleanup;
 
-    VIR_FREE(sysfs_cpuinfo);
     /* Convert to KB. */
     nodeinfo->memory = physmem_total () / 1024;
 
+cleanup:
+    VIR_FORCE_FCLOSE(cpuinfo);
+    VIR_FREE(sysfs_cpuinfo);
     return ret;
     }
 #else