Fix SymbolRef() ambiguity on 32-bit platforms

Author: staticfloat

src/Abstract/Symbol.jl

@@ -183,7 +183,7 @@ SymbolRef(symbols::Symbols, sym::SymtabEntry, idx::UInt32)
 Construct a `SymbolRef` object pointing to the given `SymtabEntry`, which
 itself represents the `idx`'th symbol within the given `Symbols` collection.
 """
-@mustimplement SymbolRef(symbols::Symbols, sym::SymtabEntry, idx::UInt32)
+@mustimplement SymbolRef(symbols::Symbols, sym::SymtabEntry, idx)
 @mustimplement deref(sym::SymbolRef)
 
 """
@@ -240,4 +240,4 @@ function show(io::IO, sym::Union{SymtabEntry{H},SymbolRef{H}}) where {H <: Objec
     end
 end
 
-show(io::IO, syms::Symbols{H}) where {H <: ObjectHandle} = show_collection(io, syms, H)
+show(io::IO, syms::Symbols{H}) where {H <: ObjectHandle} = show_collection(io, syms, H)

src/ELF/ELFSymbol.jl

@@ -175,4 +175,4 @@ function symbol_value(sym::ELFSymbolRef)
 
     # Return our ill-gotten goods
     return value
-end
+end