tweak build script to allow clang builds of mule_main; fix clang build

src/mule/mule_inline.cpp

@@ -16,7 +16,7 @@
 ////////////////////////////////
 // NOTE(allen): Inline Stepping
 
-extern unsigned int fixed_frac_bits = 5;
+unsigned int fixed_frac_bits = 5;
 static unsigned int bias = 7;
 
 static FORCE_INLINE unsigned int

src/mule/mule_main.cpp

@@ -1407,7 +1407,7 @@ extended_type_coverage_eval_tests(void){
     Base *base_array[1024] = {0};
     for(int i = 0; i < sizeof(base_array)/sizeof(base_array[0]); i += 1)
     {
-      if(i & 1 == 1)
+      if((i & 1) == 1)
       {
         base_array[i] = new DerivedA();
       }
@@ -1999,7 +1999,7 @@ control_flow_stepping_tests(void){
     if (i <= 1) goto done;
     if ((i&1) == 0) goto even_case;
     
-    odd_case:
+    // odd_case:
     i = 3*i + 1;
     
     even_case: