msvcrt: Fix printf sign flags.

dlls/msvcrt/tests/printf.c

@@ -56,6 +56,16 @@ static void test_sprintf( void )
     ok(!strcmp(buffer, "I"), "Problem with \"I\" interpretation\n");
     ok( r==1, "return count wrong\n");
 
+    format = "% d";
+    r = sprintf(buffer,format,1);
+    ok(!strcmp(buffer, " 1"),"Problem with sign place-holder: '%s'\n",buffer);
+    ok( r==2, "return count wrong\n");
+
+    format = "%+ d";
+    r = sprintf(buffer,format,1);
+    ok(!strcmp(buffer, "+1"),"Problem with sign flags: '%s'\n",buffer);
+    ok( r==2, "return count wrong\n");
+
     format = "%S";
     r = sprintf(buffer,format,wide);
     ok(!strcmp(buffer,"wide"),"Problem with wide string format\n");

dlls/msvcrt/wcs.c

@@ -438,7 +438,10 @@ static int pf_vsnprintf( pf_output *out, const WCHAR *format, va_list valist )
         while (*p)
         {
             if( *p == '+' || *p == ' ' )
-                flags.Sign = '+';
+            {
+                if ( flags.Sign != '+' )
+                    flags.Sign = *p;
+            }
             else if( *p == '-' )
                 flags.LeftAlign = *p;
             else if( *p == '0' )