Fix some more Coverity issues

Fix CID 1171365
Fix CID 1211169
Fix CID 1230038
Fix CID 1295063, 1295062, 1295061
Fix CID 1295070
Fix CID 1295068
Fix CID 12950067

libr/bin/p/bin_mach0.c

@@ -122,8 +122,12 @@ static RList* symbols(RBinFile *arch) {
 	RBinObject *obj = arch ? arch->o : NULL;
 	RList *ret = r_list_newf (free);
 
-	if (!obj || !obj->bin_obj || !ret)
+	if (!ret)
 		return NULL;
+	if (!obj || !obj->bin_obj) {
+		free (ret);
+		return NULL;
+	}
 
 	if (!(symbols = MACH0_(get_symbols) (obj->bin_obj)))
 		return ret;

libr/core/syscmd.c

@@ -122,7 +122,7 @@ R_API void r_core_syscmd_ls(const char *input) {
 			path = (const char *)homepath;
 		}
 	}
-	
+
 	if (!r_file_is_directory (path)){
 		p = strrchr(path, '/');
 		if (p){
@@ -136,9 +136,12 @@ R_API void r_core_syscmd_ls(const char *input) {
 			pattern = strdup (path);
 			path = ".";
 		}
-	} else pattern = strdup ("*");		
+	} else pattern = strdup ("*");
 	if (r_file_is_regular (path)) {
 		showfile (0, path, path, printfmt);
+		free (homepath);
+		free (pattern);
+		free (d);
 		return;
 	}
 	files = r_sys_dir (path);

libr/egg/egg.c

@@ -161,6 +161,8 @@ R_API void r_egg_syscall(REgg *egg, const char *arg, ...) {
 	if (!strcmp (arg, "close")) {
 		//egg->remit->syscall_args ();
 	}
+	if (!item)
+		return;
 	egg->remit->syscall (egg, item->num);
 }
 

libr/egg/lang.c

@@ -382,7 +382,6 @@ R_API char *r_egg_mkvar(REgg *egg, char *out, const char *_str, int delta) {
 		rcc_pushstr (egg, str, mustfilter);
 		ret = r_egg_mkvar (egg, out, foo, 0);
 	}
-	free (oldstr);
 	return ret;
 }
 

libr/io/p/io_zip.c

@@ -578,12 +578,14 @@ RIOZipFileObj* r_io_zip_alloc_zipfileobj(const char *archivename, const char *fi
 	for (i=0; i < num_entries; i++) {
 		zip_stat_init (&sb);
 		zip_stat_index (zipArch, i, 0, &sb);
-		if (strcmp (sb.name, filename) == 0) {
-			zfo = r_io_zip_create_new_file (
-				archivename, filename, &sb,
-				flags, mode, rw);
-			r_io_zip_slurp_file (zfo);
-			break;
+		if (sb.name != NULL) {
+			if (strcmp (sb.name, filename) == 0) {
+				zfo = r_io_zip_create_new_file (
+					archivename, filename, &sb,
+					flags, mode, rw);
+				r_io_zip_slurp_file (zfo);
+				break;
+			}
 		}
 	}
 	if (!zfo)

libr/socket/socket.c

@@ -180,6 +180,7 @@ R_API int r_socket_connect (RSocket *s, const char *host, const char *port, int
 				if (ret == -1) {
 					close (s->fd);
 					s->fd = -1;
+					freeaddrinfo (res);
 					return R_FALSE;
 				}
 				freeaddrinfo (res);

shlr/gdb/src/core.c

@@ -721,10 +721,13 @@ int send_ack(libgdbr_t* g) {
 }
 
 int send_command(libgdbr_t* g, const char* command) {
-	uint8_t checksum = cmd_checksum (command);
+	uint8_t checksum;
 	int ret;
+
 	if (!g || !command)
 		return -1;
+
+	checksum = cmd_checksum (command);
 	ret = snprintf(g->send_buff, g->send_max,
 		"$%s#%.2x", command, checksum);
 	if (ret >= 0) {