res_format_attr_h26x: Trim blanks in fmtp attributes

Some devices separate format attributes with a semicolon followed by a
space, so trim blanks before trying to match them.

ASTERISK-27008 #close

Change-Id: Ia44cb2e4fef5c73dc541a29da79cb0e19c22d9cc

res/res_format_attr_h263.c

@@ -156,6 +156,8 @@ static struct ast_format *h263_parse_sdp_fmtp(const struct ast_format *format, c
 	while ((attrib = strsep(&attribs, ";"))) {
 		unsigned int val, val2 = 0, val3 = 0, val4 = 0;
 
+		attrib = ast_strip(attrib);
+
 		if (sscanf(attrib, "SQCIF=%30u", &val) == 1) {
 			attr->SQCIF = val;
 		} else if (sscanf(attrib, "QCIF=%30u", &val) == 1) {

res/res_format_attr_h264.c

@@ -184,6 +184,8 @@ static struct ast_format *h264_parse_sdp_fmtp(const struct ast_format *format, c
 		unsigned int val;
 		unsigned long int val2;
 
+		attrib = ast_strip(attrib);
+
 		if (sscanf(attrib, "profile-level-id=%lx", &val2) == 1) {
 			attr->PROFILE_IDC = ((val2 >> 16) & 0xFF);
 			attr->PROFILE_IOP = ((val2 >> 8) & 0xFF);