Avoid some potential FILE * leaks

* qemud/qemud.c src/cgroup.c src/uml_driver.c src/util.c: close
  some potential FILE * leaks
Daniel

src/cgroup.c

@@ -57,7 +57,7 @@ void virCgroupFree(virCgroupPtr *group)
 
 static virCgroupPtr virCgroupGetMount(const char *controller)
 {
-    FILE *mounts;
+    FILE *mounts = NULL;
     struct mntent entry;
     char buf[CGROUP_MAX_VAL];
     virCgroupPtr root = NULL;
@@ -90,6 +90,8 @@ static virCgroupPtr virCgroupGetMount(const char *controller)
 
     return root;
 err:
+    if (mounts != NULL)
+        fclose(mounts);
     virCgroupFree(&root);
 
     return NULL;

src/uml_driver.c

@@ -547,6 +547,7 @@ reopen:
 
     if (fscanf(file, "%d", &vm->pid) != 1) {
         errno = EINVAL;
+        fclose(file);
         goto cleanup;
     }
 
@@ -1040,6 +1041,7 @@ static int umlGetProcessInfo(unsigned long long *cpuTime, int pid) {
 
     if (fscanf(pidinfo, "%*d %*s %*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u %llu %llu", &usertime, &systime) != 2) {
         umlDebug("not enough arg");
+        fclose(pidinfo);
         return -1;
     }
 

src/util.c

@@ -1058,6 +1058,7 @@ int virFileReadPid(const char *dir,
 
     if (fscanf(file, "%d", pid) != 1) {
         rc = EINVAL;
+        fclose(file);
         goto cleanup;
     }