1) Don't propagate precision of built-in function arguments to return type when return type is bool (e.g., isnan).

2) Check an additional path for missing default precision qualification, except allow built-in declarations to pass the check.  

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22241 e7fa87d3-cd2b-0410-9028-fcbf551c1848

glslang/MachineIndependent/glslang.y

@@ -1483,6 +1483,8 @@ fully_specified_type
             if (parseContext.profile == EEsProfile)
                 parseContext.arraySizeRequiredCheck($1.line, $1.arraySizes->front());
         }
+
+        parseContext.precisionQualifierCheck($$.line, $$);
     }
     | type_qualifier type_specifier  {
         parseContext.globalQualifierFix($1.line, $1.qualifier, $2);