Fix for bug #22029: str_to_date returning NULL, while date_format works using identical format.

The problem appears when we have a space followed by a non-format symbol.

Fix: properly skip spaces.

mysql-test/r/date_formats.result

@@ -530,4 +530,13 @@ DATE_FORMAT('%Y-%m-%d %H:%i:%s', 1151414896)
 NULL
 Warnings:
 Warning	1292	Truncated incorrect datetime value: '%Y-%m-%d %H:%i:%s'
+select str_to_date('04 /30/2004', '%m /%d/%Y');
+str_to_date('04 /30/2004', '%m /%d/%Y')
+2004-04-30
+select str_to_date('04/30 /2004', '%m /%d /%Y');
+str_to_date('04/30 /2004', '%m /%d /%Y')
+2004-04-30
+select str_to_date('04/30/2004 ', '%m/%d/%Y ');
+str_to_date('04/30/2004 ', '%m/%d/%Y ')
+2004-04-30
 "End of 4.1 tests"

mysql-test/t/date_formats.test

@@ -317,4 +317,12 @@ SELECT TIME_FORMAT("25:00:00", '%l %p');
 #
 SELECT DATE_FORMAT('%Y-%m-%d %H:%i:%s', 1151414896);
 
+#
+# Bug #22029: str_to_date returning NULL
+#
+
+select str_to_date('04 /30/2004', '%m /%d/%Y');
+select str_to_date('04/30 /2004', '%m /%d /%Y');
+select str_to_date('04/30/2004 ', '%m/%d/%Y ');
+
 --echo "End of 4.1 tests"

sql/item_timefunc.cc

@@ -171,15 +171,15 @@ static bool extract_date_time(DATE_TIME_FORMAT *format,
   for (; ptr != end && val != val_end; ptr++)
   {
 
+    /* Skip pre-space between each argument */
+    while (val != val_end && my_isspace(cs, *val))
+      val++;
+
     if (*ptr == '%' && ptr+1 != end)
     {
       int val_len;
       char *tmp;
 
-      /* Skip pre-space between each argument */
-      while (val != val_end && my_isspace(cs, *val))
-	val++;
-
       val_len= (uint) (val_end - val);
       switch (*++ptr) {
 	/* Year */