fix FI_* of Math.*

src/modules.js

@@ -259,7 +259,7 @@ var Functions = {
     }
     if (phase != 'post' && singlePhase) {
       if (!doNotCreate) this.indexedFunctions[ident] = 0; // tell python we need this indexized
-      return "'{{ FI_" + ident + " }}'"; // something python will replace later
+      return "'{{ FI_" + toNiceIdent(ident) + " }}'"; // something python will replace later
     } else {
       var ret = this.indexedFunctions[ident];
       if (!ret) {
@@ -318,7 +318,7 @@ var Functions = {
         if (ASM_JS) {
           var curr = table[i];
           if (curr && curr != '0' && !Functions.implementedFunctions[curr]) {
-            curr = curr.replace('.', '_'); // fix Math.* to Math_*
+            curr = toNiceIdent(curr); // fix Math.* to Math_*
             // This is a library function, we can't just put it in the function table, need a wrapper
             if (!wrapped[curr]) {
               var args = '', arg_coercions = '', call = curr + '(', retPre = '', retPost = '';