cmd/ld, runtime: clean up CL 9666047

Remove unnecessary ( ) around == in && clause.
Add { } around multiline if body, even though it's one statement.

Add runtime: prefix to printed errors.

R=cshapiro, iant
CC=golang-dev
https://golang.org/cl/9685047

src/cmd/ld/lib.c

@@ -1914,13 +1914,13 @@ genasmsym(void (*put)(Sym*, char*, int, vlong, vlong, int, Sym*))
 		/* frame, locals, args, auto, param and pointers after */
 		put(nil, ".frame", 'm', (uint32)s->text->to.offset+PtrSize, 0, 0, 0);
 		put(nil, ".locals", 'm', s->locals, 0, 0, 0);
-		if((s->text->textflag & NOSPLIT) && (s->args == 0) && (s->nptrs < 0))
+		if((s->text->textflag & NOSPLIT) && s->args == 0 && s->nptrs < 0) {
 			// This might be a vararg function and have no
 			// predetermined argument size.  This check is
 			// approximate and will also match 0 argument
 			// nosplit functions compiled by 6c.
 			put(nil, ".args", 'm', ArgsSizeUnknown, 0, 0, 0);
-		else
+		} else
 			put(nil, ".args", 'm', s->args, 0, 0, 0);
 		if(s->nptrs >= 0) {
 			put(nil, ".nptrs", 'm', s->nptrs, 0, 0, 0);

src/pkg/runtime/symtab.c

@@ -204,7 +204,7 @@ dofunc(Sym *sym)
 		if(runtime·strcmp(sym->name, (byte*)"etext") == 0)
 			break;
 		if(sym->value < lastvalue) {
-			runtime·printf("symbols out of order: %p before %p\n", lastvalue, sym->value);
+			runtime·printf("runtime: symbols out of order: %p before %p\n", lastvalue, sym->value);
 			runtime·throw("malformed symbol table");
 		}
 		lastvalue = sym->value;
@@ -230,7 +230,7 @@ dofunc(Sym *sym)
 		else if(runtime·strcmp(sym->name, (byte*)".nptrs") == 0) {
 			// TODO(cshapiro): use a dense representation for gc information
 			if(sym->value != func[nfunc-1].args/sizeof(uintptr)) {
-				runtime·printf("pointer map size and argument size disagree\n");
+				runtime·printf("runtime: pointer map size and argument size disagree\n");
 				runtime·throw("mangled symbol table");
 			}
 			cap = ROUND(sym->value, 32) / 32;
@@ -239,12 +239,12 @@ dofunc(Sym *sym)
 			func[nfunc-1].ptrs.cap = cap;
 		} else if(runtime·strcmp(sym->name, (byte*)".ptrs") == 0) {
 			if(func[nfunc-1].ptrs.len >= func[nfunc-1].ptrs.cap) {
-				runtime·printf("more pointer map entries read than argument words\n");
+				runtime·printf("runtime: more pointer map entries read than argument words\n");
 				runtime·throw("mangled symbol table");
 			}
 			((uint32*)func[nfunc-1].ptrs.array)[func[nfunc-1].ptrs.len++] = sym->value;
 		} else {
-			runtime·printf("invalid '%c' symbol named '%s'\n", (int8)sym->symtype, sym->name);
+			runtime·printf("runtime: invalid '%c' symbol named '%s'\n", (int8)sym->symtype, sym->name);
 			runtime·throw("mangled symbol table");
 		}
 		break;