fix ccall regex for minified code, and add testing

Author: kripken

src/preamble.js

@@ -396,7 +396,7 @@ var cwrap, ccall;
     return ret;
   }
 
-  var sourceRegex = /^function\s\((.*)\)\s*{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?}$/;
+  var sourceRegex = /^function\s\(([^)]*)\)\s*{\s*([^*]*?)[\s;]*(?:return\s*(.*?)[;\s]*)?}$/;
   function parseJSFunc(jsfunc) {
     // Match the body and the return value of a javascript function source
     var parsed = jsfunc.toString().match(sourceRegex).slice(1);

tests/test_core.py

@@ -5453,9 +5453,6 @@ def test_corruption_3(self):
   ### Integration tests
 
   def test_ccall(self):
-    if self.emcc_args is not None and '-O2' in self.emcc_args:
-      self.emcc_args += ['--closure', '1'] # Use closure here, to test we export things right
-
     post = '''
 def process(filename):
   src = \'\'\'
@@ -5499,6 +5496,11 @@ def process(filename):
 
     self.do_run_from_file(src, output, post_build=post)
 
+    if self.emcc_args is not None and '-O2' in self.emcc_args:
+      print 'with closure'
+      self.emcc_args += ['--closure', '1']
+      self.do_run_from_file(src, output, post_build=post)
+
   def test_pgo(self):
     if Settings.ASM_JS: return self.skip('PGO does not work in asm mode')