* threadproc/win32/proc.c
  (quote_arg): Use '\0' instead of 0 for character constant.

git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1929719 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/threadproc/win32/proc.c b/threadproc/win32/proc.c
index c2488a2..c0c0a5b 100644
--- a/threadproc/win32/proc.c
+++ b/threadproc/win32/proc.c
@@ -355,7 +355,7 @@
             ch++;
         }
 
-        if (*ch == 0) {
+        if (*ch == '\0') {
             /* Escape backslashes. */
             needed += backslash_count * 2;
             break;
@@ -391,7 +391,7 @@
             ch++;
         }
 
-        if (*ch == 0) {
+        if (*ch == '\0') {
             memset(dst, '\\', backslash_count * 2);
             dst += backslash_count * 2;
             break;
@@ -408,7 +408,7 @@
         }
     }
     *dst++ = '"';
-    *dst = 0;
+    *dst = '\0';
 
     return escaped;
 }