Fix for #39 - adding checks before processing (#40)

Adding checks before processing to avoid errors in logs.

Author: eterchun

prs-core.lua

@@ -78,6 +78,9 @@ local function get_dropped_and_added_affects(old_affects, new_affects)
 end
 
 function core.on_gmcp_char(event, args)
+    if not gmcp.Char.State then return end
+    if not gmcp.Char.State.update then return end
+    
     local diff_table = gmcp.Char.State.update
 
     local dropped = {}
@@ -102,6 +105,9 @@ function core.on_gmcp_char(event, args)
 end
 
 function core.on_gmcp_char_state(event, args)
+    if not gmcp.Char.State then return end
+    if not gmcp.Char.State.update then return end
+    
     local diff_table = gmcp.Char.State.update
 
     local dropped = {}
@@ -140,4 +146,4 @@ function core.stop()
     end
 end
 
-core.initialize()
+core.initialize()