Sdp-utils: janus_sdp_get_video_profile() function > I think exception handling is needed

General
1

(My english is not that good.)
I am deeply grateful for Janus.

Exception handling seems necessary when extracting the profile from the following fmtp string if there is a space after the semicolon (;).

vfmtp ex)
blank_x = "packetization-mode=1;profile-level-id=4D401F;sprop-parameter-sets=SPS,PPS";
blank_o = "packetization-mode=1; profile-level-id=4D401F; sprop-parameter-sets=SPS,PPS"

test 1) janus_sdp_get_video_profile(JANUS_VIDEOCODEC_H264, blank_x)
--> result is "4D401F"

test 2) janus_sdp_get_video_profile(JANUS_VIDEOCODEC_H264, blank_o);
--> result is "=4D401F"

src/sdp-utils.c

char *janus_sdp_get_video_profile(janus_videocodec codec, const char *fmtp) {
	...
	while(index != NULL) {
		if(strstr(index, needle) != NULL) {
			profile = index + strlen(needle); <- *ADD WHITESPACE LENGTH*
			if(strlen(profile) > 0)
				profile = g_strdup(profile);
			else
				profile = NULL;
			break;
		}
		...
	}
	...
}