Some more fixes from upstream xine:

* Fix program termination due to invalid Real Media SDP; reported by Roland
Kay. [bug #1602663]

CVS patchset: 8441
CVS date: 2006/12/25 16:12:16

modules/access/rtsp/real_sdpplin.c

@@ -91,7 +91,7 @@ static char *nl(char *data) {
 static int filter(const char *in, const char *filter, char **out) {
 
   int flen=strlen(filter);
-  int len;
+  size_t len;
 
   if (!in) return 0;
 
@@ -179,12 +179,14 @@ static sdpplin_stream_t *sdpplin_parse_stream(char **data) {
     }
     if(filter(*data,"a=OpaqueData:buffer;",&buf)) {
       decoded = b64_decode(buf, decoded, &(desc->mlti_data_size));
+      if ( decoded != NULL ) {
           desc->mlti_data = malloc(sizeof(char)*desc->mlti_data_size);
           memcpy(desc->mlti_data, decoded, desc->mlti_data_size);
           handled=1;
           *data=nl(*data);
           lprintf("mlti_data_size: %i\n", desc->mlti_data_size);
       }
+    }
     if(filter(*data,"a=ASMRuleBook:string;",&buf)) {
       desc->asm_rule_book=strdup(buf);
       handled=1;
@@ -244,28 +246,36 @@ sdpplin_t *sdpplin_parse(char *data) {
     }
     if(filter(data,"a=Title:buffer;",&buf)) {
       decoded=b64_decode(buf, decoded, &len);
+	  if ( decoded != NULL ) {
           desc->title=strdup(decoded);
           handled=1;
           data=nl(data);
       }
+    }
     if(filter(data,"a=Author:buffer;",&buf)) {
       decoded=b64_decode(buf, decoded, &len);
+	  if ( decoded != NULL ) {
           desc->author=strdup(decoded);
           handled=1;
           data=nl(data);
       }
+    }
     if(filter(data,"a=Copyright:buffer;",&buf)) {
       decoded=b64_decode(buf, decoded, &len);
+	  if ( decoded != NULL ) {
           desc->copyright=strdup(decoded);
           handled=1;
           data=nl(data);
       }
+    }
     if(filter(data,"a=Abstract:buffer;",&buf)) {
       decoded=b64_decode(buf, decoded, &len);
+      if ( decoded != NULL ) {
            desc->abstract=strdup(decoded);
            handled=1;
            data=nl(data);
       }
+    }
     if(filter(data,"a=StreamCount:integer;",&buf)) {
       desc->stream_count=atoi(buf);
       desc->stream = malloc(sizeof(sdpplin_stream_t*)*desc->stream_count);